Computer【汇编4篇】
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Computer【第一篇】
unit 3 computers
the 4th period: listening & speaking
goals:
1. to practise listening comprehension.
practise making decisions and reasoning
teaching procedures:
step1. revision
1. check the homework exercises.
1). it has been reported that children will be offered free education.
it has been reported that free education will be offered to children.
2). it has been said that we will be offered the latest computer science course book.
it has been planned that the latest computer science course book will be offered to us.
3). i have been told by peter that i will be lent his notebook computer for a week.
i have been told by peter that his notebook computer will be lent to me for a week.
2. question: what can computers be used as?
step2. lead-in
as we know, science and technology is developing very fast and computers have become smaller and smaller. they have been used in many fields. so, the 21st century is the century of information technology what does it mean? does information technology/ it only mean things like computers? of cause not. actually, it means more than computers. computers are just one kind of it. what else do you know is part of it?
(tv, radio, cd-rom, dvd, books……)
step3. listening (sb)
1. pre-listening: what are the changes brought by different forms of it ?
what are the advantages and disadvantages of them ?
2. while-listening:
go through the chart and make sure the students look at the chart before they listen to the tape. (this is to sharpen their attention and listen for the answers. this will also help them get the gist of the text.) then listen to the tape and finish filling in the chart. (if necessary, play the tape for several times.)
say: after listening to their talk, we know all kinds of it have both disadvantages and ’s check the answers together.
type of it advantages disadvantages
tv you can both listen and watch. you cannot write to friends.
web you can find information. it is very expensive.
radio you can listen to english. you cannot watch a film.
book you can get information. sometimes it is out of date.
3. post-listening:
1) (pair work): decide which type of it is best for you to use right now. make your choice and give your reasons by using the following expressions.
i think that….
in my opinion, ….
i believe that….
i agree because….
i disagree because….
i’ve decided that….
2) (group work): discussion :
computers are useful and have brought us lots of good things, but they also cause bad effects. what attitude should we have towards the computer? (make good use of it but never get trapped by it.)
step4. speaking
1. pre-speaking
say: from what we have learn, we should admit that computers and the web have a great influence on the school education as well as people’s life. it has come into people’s everyday life and many families hold computers in their homes. now there is a task for you.
2. while-speaking
1) situation: you have been asked by your parents to help choose computers for your home. you and your friend have looked at several computers. talk about the special things each computer can do. make a decision about which kind of computer to buy and explain why.
information input: show students some pictures of different computers (desktop computer & laptop computer & …)
language input: useful expressions (repeat it to strengthen students’ ability of use it.)
supporting an opinion challenging an opinion
i think that … , because … perhaps, but what if / about …?
first, … have you thought about …?
one reason is that … what makes you think that …?
i think it is better because… i don’t like it because….
(pair work )use the expressions to support your opinion or challenging other’s opinions.
2) oral report: (individual work )
do an oral report to your father and start your report like this: i looked at many different computers. the one i have chosen is the pep personal computer. one of the main reasons is that it is suitable for homes. i found that…
3. post-speaking
conclusion—what useful expression do we use to make a decision and reason?
(in this way, they can review and use the words and phrases again.)
step5. homework
page 22. writing: write a report about your choice and try to use the present perfect passive voice as well as the useful words and expressions that have been mentioned above. in your report.
教学目标【第二篇】
Teaching aims and demands
本单元有关电脑的知识使用学生对其有一个初步的了解。让学生了解有关中国民航运用计算机的情况。并学习如何使用向对方提建议的口语练习，通过单词的学习掌握go up, bring down, prefer to and, but although等词的用法。本单元的语法重点是现在完成时被动语态的使用，要求学生能够了解和掌握。
Teaching important and difficult points
Vocabulary:
although, waste, believe, necessary, passenger, record, at one time, greatly, correct, complete, decision, abroad, change for
2、 Daily Expressions:
First of all, …
I believe…
Any reason?
3、 Useful phrases:
It would be a waste of …
In my opinion, we should …
4、 Grammar
The present perfect passive voice.
教学建议
1、 通过对话练习，进行两个人之间对建议和推荐的用法。
2、 通过课文的学习，掌握本单元的词和词组的用法。
3、 通过对课外补充文章的学习，对计算机的历史和应用有所了解。
Lesson 33: 口头练习：对话交际功能——日常生活用语。
Lesson 34: 学生进行对文章编成对话练习。练习直接引语变间接引语。
Lesson 35: 学生继续练习对话。可以扮演CAAC的领导和记者，或计算机经销商和单位领导，或电视节目主持人和中学生等等。
Lesson 36: 笔头练习：让学生写1篇关于自己生活中计算机的使用的文章，或对计算机在人们生活中应用的畅想。
教材分析
本单元的对话的特点是通过两个人对买何种计算机的讨论，从而掌握如何进行对一个物品进行评价、表达自己的观点，并提出建议。比如常见的口语用法：In my opinion, we should… / What’s your opinion?/ I don’t think it’s necessary to …/ I believe …/ I still think … 就在这个对话中经常出现。同时还有很多其它有用的口语，比如：First of all…/ in a few years’ time/ a waste of …/ make a decision/ not … any more
本单元的课文不仅讲述了计算机的应用对CAAC的帮助，而且中间穿插了很多现在完成进行时的被动语态的用法，使得学生能够正确地掌握这个语法的用法。同时对一些常见词和短语进行理解。比如：join, be used to do, thanks to, abroad, spend… on sth.， prefer to do, welcome.
重点知识讲解
1、 Today they are talking about buying a new computer. 今天他们谈论买一个计算机。
这里的talk about的意思是“谈论；谈及到；讨论”，后面通常加上名词或动名词。
We talked about it yesterday.
I want to talk about the price of the car with you.
2、 Did you find out the price for the IBM PC 486? 你找出IBM PC 486的价格了么？
这里的词组find out和find都是表示“找出”，都是一个结果。但是两种也有区别：如果表示意外发现，通常用find。比如：
I found this wallet outside the classroom.
What did you find just now?
如果要表示经过一番努力或研究得出的结果的时候，find和find out都可以，但通常用后者。比如：
I finally found out the secret of his death.
She wanted to find out the real answer to the question.
3、 I’ve got the information for all the computers now. 我已经得到了所有计算机的信息了。
这里的'information同news一样是一个不可数名词。后面通常加上for或about，前面通常加上一些修饰不可数名词的形容词。比如：
Do you have any information about the new machine.
4、 In my opinion, we should buy the IBM PC 586. 依我看来，我们应该买IBM PC 586。
这里的in one’s opinion表示的意思是“依…来看；…的意见是”。需要注意两点：1）后面不加I/he…think(s)。不像中文里可以说“依我看来，我觉得…”。在英语中这两种用法不同时出现。比如：
In my opinion, you are the best student. 不能说成 In my opinion, I think you are the best student.
2)后面不加客观事实。因为这里应是一个推断或主观的意见，比如：
In my opinion, the earth is round. （错误句子）。
In my opinion, you are right. （正确句子）
5、 If we buy the smaller one, the IBM PC 486, we might have to change it in a few years’ time for a bigger one. 如果我们现在要是买了the IBM PC 486，几年以后我们肯定要换一个更大的计算机。
这里的词组change… for…表示的意思是“将…换成…”。比如：
I want to change this small hat for a bigger one.
6、 I hope we can make a decision today. 我希望我们今天能做出决定。
这里的词组是make a decision（做出决定）。等于decide to do。比如：
Did they make a decision yesterday?
另外也可以用come to a decision, arrive at a decision来表示同样的意思。比如：
They finally came to a decision at the meeting.
7、 It is used to record the tickets which passengers buy. 它还记录下游客购票的情况。
句子中的be used to的意思是“被用来…”，是一个被动语态，后面加上动词原型。
The water her is used to make the trees alive.
Computers are used here to play games on.
8、 Now it is possible to find out much faster which planes are full. 现在要找到哪架飞机满了比以前要快多了。
这里用了一个much表示一个程度。通常在much, even和still后面加上一个形容词或副词的比较级形式。比如：
I am much heavier than before.
She is much happier than she was two years ago.
9、 Thanks to the new computer, the passengers at the offices of the CAAC can now buy their aeroplane tickets much faster. 由于使用了新的计算机，乘客在中国民航购票快多了。
句子中的thanks to是一个常见的短语，表示“由于；幸亏”，相当于because of, 或者as a result of表示原因。比如：
Thanks to your help, I was able to win the game.
They lost the game thanks to the foolish advice you gave them.
10、 At one time, there were long queues of people waiting outside the CAAC offices. 以前，中国民航办公室前等着购票的人们排成长长的队列。
词组at one time表示的意思是“以前；曾经”。比如：
At one time we met each other every day.
He went to that restaurant to have dinner at one time.
11、 These people will be welcome on our planes. 我们欢迎这些人来乘坐我们的飞机。
这里的welcome在这句话中是一个形容词，表示的意思是“受欢迎的”，后面常加的是不定式。比如：
You are welcome to do anything you like.
Welcome to Beijing.
welcome这个词也可以是名词。比如：
They received a cold welcome when they arrived.
同样welcome也可以作为一个及物动词，但后面不加不定式，而且过去式和过去分词都是welcomed。比如：
All the students welcomed the visiting friends at the school gate.
12、 In my opinion, we should buy the IBM PC 586. 依我看来，我们应该买IBM PC 586。
这里的情态动词should表示的意思是“应该”，通常用在表示建议的句子中。比如：
I should go home before 6 o’clock.
You should not ask others to do your homework.
13、 If we buy the smaller one, the IBM PC 486, we might have to change it in a few years’ time for a bigger one. 如果我们现在要是买了IBM PC 486，几年以后我们肯定要换一个更大的计算机。
这里的if是一个条件句。后面出现的两个逗号之间的东西从位置上说是一个插入语，从成份上来说是一个同位语，是对前面的名词the smaller one进行解释。我们通常用一个名词性短语或从句来作为同位语
14、 I don’t think I it’s necessary to buy the bigger one.我想没必要买较大的那个。
我们通常在think, suppose, expect, imagine等表示心理活动的动词后面不加否定含义的宾语从句。如果后面的从句使一个否定句，我们常常将从句谓语动词的否定是转移到主句的谓语动词之前。比如：
I don’t think I can get away at the moment.
I don’t suppose you need to worry.
I don’t think I know you.
15、 The IBM PC 486 will be big enough for us. IBM PC 486对我们来说就够大的了。
句子中的enough可以是形容词，也可以是副词。通常我们将enough放在名词前面或形容词或副词的后面。而且通常在后面再加上不定式。比如：
I don’t have enough money to buy a house.
I am not rich enough to buy a house.
16、 We mustn’t waste any more time. 我们不可以在浪费更多的时间了。
这里的情态动词mustn’t表示的不是“必须不”而是“不可以；不允许”。通常用在命令的句子中。比如：
You mustn’t talk in class. It is not a good habit.
We mustn’t go there because it is dangerous.
17、 We must decide which one to buy. 我们必须决定买哪一个。
这里的which one to buy为特殊不定式短语，在句子中做decide的宾语。特殊不定式的构成形式为“关系代词或关系副词+动词不定式”。常用的关系代词有：what, which, who, whether等；常用的关系副词有how, when, where, why等。比如：
We haven’t decided what to do next.
I don’t know how to write in English.
I will ask when to start tomorrow morning.
She will ask where to live.
18、 At one time, there were long queues of people waiting outside the CAAC offices. 以前，中国民航办公室前等着购票的人们排成长长的队列。
这里的waiting是一个现在分词，在句子中做people的定语，放在名词后，相当于一个定语从句。比如：
The foreigner talking with our teacher is head of the visiting group.
The man running after the bus is a friend of mine.
19、 As a result, the number of people who travel by plane in China is larger than ever before. 因此，在中国乘飞机旅行的人数比以往多了。
这句话中的as a result的作用相当于一个副词，意思相当于so。比如：
He hurt himself. As a result, he couldn’t go to school.
这句话中的the number of 的中心词是number，说明谓语动词肯定是单数的。比如：
The number of the books in this bookshop is more than 200,000.
20、 我们在很多句子中都用一个代词来代替前面提到的名词，常见的有one, it和that。这三个词都是代词的时候的区别：
1, one=a/an +noun 所代表的是前面提到的同类中的任何一个
He has no book and no money to buy one.
The hat is too small. Please show me a larger one.
2, it= the/this/that/adj.+ noun 指同一件事物
He has a book, but he will not lend it to me.
I drank some iced water, but it made me more thirsty.
3, that = the + noun 指前面所提到的同一类中的另外制定的一个。
The air of the country is purer than that of the city.
比较下面三句话：
I cannot find my umbrella; I think I must buy one.
I cannot find umbrella; I don’t know where I put it.
The umbrella you bought is cheaper than that I bought.
教学设计方案Lesson 33
一、Teaching Aims
1、 Help Ss understand the general ideas and some details in the dialogue
2、 Practice in pairs on making a new dialogue about something they are about to buy
3、 Teach them how to use some of the words and expressions in the dialogue
二、Teaching procedures
Step I Warming Up
1、 Give a student 5 minutes to have his/her own free talk about anything he/she enjoys
2、 Encourage Ss to ask the student questions about his/her free talk
3、 Ask Ss how many of them have got a computer at home
4、 Ask those who have computers what kind of computers they are using
5、 Write down “486, 586, desktop, laptop, PC, Mac, Gameboy” on the blackboard
Step II Listening
1、 Play tape of Lesson 33 twice and ask them to listen to the tape without looking at their books
2、 Give Ss question before they listen and ask them to try to understand the dialogue with those questions
1) How many people are there in the dialogue?
2) What are they talking about?
3) Do they finally agree with each other?
3、 Ask three students to answer the questions above
Step III Reading
1、 Ask Ss one by one questions about the dialogue:
1) What did Jenny probably ask Mei Ge to do before they have the dialogue? (to find out the price for the IBM PC 486)
2) What does Jenny prefer to buy, PC 486 or PC 586? Why? (see book for the answer)
3) Why does Mei Ge want to buy the smaller one?
4) Why can’t they waste any more time? (price may go up and the factory needs the computers badly)
5) What is their final decision? (not mentioned)
2、 Ask the next student to correct the mistakes if any
3、 Give Ss one minute or two to go over the dialogue again and then ask one of the students to be Jenny and tell the others what has happened in the dialogue
One possible answer:
I am Jenny and I am working with Mei Ge in a factory. Our factory planned to buy a new computer so Mei Ge and I talked about buying a new computer. I asked Mei Ge to find out the price of the IBM PC 486 but I want to buy the IBM PC 586 because it is better and bigger. What’s more, we will change the 486 for 586 in a few years’ time. But Mei Ge still prefers the smaller one because he thinks it is a waste of money to buy a very good one. He believes PC 486 is good enough. We will meet again to make a decision the next day.
4、 Ask another student to be Mei Ge and tell the others what has happened
Step IV Teaching
1、 Teaching Ss the use of different words and expressions
2、 Ask Ss to repeat the sentences which the teacher gives and after that ask them to make some new sentences with the words and expressions
Step V Practice
1、 Ask students to use the words and expressions to make a new dialogue
2、 Ask other students to find out the mistakes
Step VI Summary
Ask one of the Ss to tell other Ss what they have learned and write them down on the blackboard
Step VII Homework
1、 Ask Ss to be the manager of the factory and make up a new dialogue
One possible answer:
M (Manager): Jenny, would you please come to my office? I need to talk to you.
J (Jenny): OK. What can I do for you?
M: Our factory is becoming better and better and now we need a new computer because our computer is too old. I want you and Mei Ge to buy a new computer for our factory.
J: Yes. What kind of computers you want us to buy?
M: I don’t know much about it. You and Mei Ge can ask for the price first.
J: OK. We will check the price first. But I think we should buy a PC 586, which is very new now.
M: Ask Mei Ge to check the price first. Tell me the decision next week.
J: All right. We will do that.
2、 Make good preparation for the next lesson
教学设计方案Lesson 34
一、Teaching Aims
1、 Get some general ideas on how computers help CAAC
2、 Learn some useful words and expressions
3、 Be able to use the new words and expressions to make new passage
二、Teaching Procedure
Step I Warming up
1、 Ask those Ss who have computers at home what they use computers for
2、 Write those purposes down on the blackboard “Games, Word Processing, Programming, Internet, Chat, Drawing, Watching Movies, Making Flash Movies…”
3、 Ask Ss questions before they get to the text
1) What can computers do for CAAC?
2) How do the computers sell the tickets?
Step II Listening
Listen to the tape for Lesson 34 once
Step III Reading
1、 Ask Ss to read the text
2、 Answer the following questions without looking at the book
1)What is the computer used for in the CAAC?
2)What did people usually do when they wanted to buy a ticket before the use of computers?
3)How many the CAAC offices are there in the world?
4)Why do more people in China like to travel by plane?
5)Why do the people in the CAAC want to buy more computers?
3、 Ask the next student to correct the mistakes if any
Step IV Discussion
1、 Ask Ss to work in a group of four to discuss that whether computers are useful in our daily study of English
2、 Ask each group to present their idea and opinions
Step V Language Points
1、 Write down the useful expressions and ask Ss to explain and repeat the sentences teachers have given them
2、 Ask Ss to make a short passage by using the words and expressions they have learned One possible answer:
In my opinion, studying abroad is very good for those students who want to improve their language, because if they make a decision to go abroad to study, their English will be greatly improved. They also can correct their pronouncing mistakes. At one time, there was no chance for Chinese people to go to other countries. But now we can be a passenger on the plane to other country. We believe it is necessary to change our life for a better one.
3、 First, ask Ss to repeat the above passage
4、 Ask them to make a new one by using at least 3 of the new words and expressions they have learned
Step VI Homework
Ask Ss to write their new passage and hand in next time
探究活动
Discuss the questions:
1．What kind of machine is the computer? (wonderful)
2．What kind of invention is it? (important)
3．Why is there a lot of information in the computer?
(have a memory, store, take out)
4．What kind of work can they do? (people can do)
5．What do the students need to learn? (how to use the computer)
Computer【第三篇】
period 4 listeningthe general idea of this period：this period includes listening and writing on page 21；listening on page 55 and listening task on page ，the purpose of this period is to train the students’ listening—for information；for comprehension and for ，the students will be trained to express their own opinions after aims： the students to learn about the knowledge of information the students to get the main ideas of the listening important and difficult points： to get the main idea and information in their own opinions after methods： aids： tape procedures：step 1 revisioncheck the students’ the students to work together with their partners to interview each 2 listening and writing （page 21）task 1 listen to a conversationt：class，as we all know，the 21st century is the century of information and we will listen to a conversation about different kinds of information technology or as we know，each kind of information technology has its own advantages and from this conversation we will listen for the advantages and disadvantages of each before listening let’s first look at the pictures on page 21 and the form on page 22 to make sure what you are going to do while ，let’s students listen to the conversation for the first 2 discussion and fillingt：you can see there are a tv，a cd-rom，a computer，a radio，a dvd and newspaper try to finish filling in the form with the information you have just got from the answers：
type of it
advantages
disadvantages
tv
you can both listen and watch
you can’t write to friends
web
you can find information
it’s very expensive
radio
you can listen to english
you can not watch
book
you can get information
sometimes it is out-of-datet：now，let’s discuss the advantages and disadvantages of each type of it in small groups and then decide which type of it is best for you to use，according to the form above and explain the discussing，remember to use the following expressions：i think that...in my opinion...i believe that...i agree because...i disagree because...i’ve decided that...step 3 listening （page 55）t：now come to the listening on page you listening，please read the requirements of that，you will find the three robots from the pictures above on page 55 and number possible number：picture 1— picture 3— picture 4—：now please look at these boxes on page 55 before you listen to the tape again，and try to find out the listening more attention to these points and you may make some notes while minutes ：now try to fill in the boxes with the information from the listening material，and then check your answers with your answers：
personal robot
information
size
35 cm
what it looks like
robot with five arms
what it can do
all homework
price
50 yuan a day
bird-like android
information
size
10 cm
what it looks like
bird-like android
what it can do
sings beautifully
price
600 yuan
lonely android
information
size
2 m
what it looks like
large，energetic robot
what it can do
climbs mountains；plays guitar；sings karaoke
telephone number
room-1234step 4 listening task （page 58）t：now please turn to page 58，and finish the listening we know，computers are used widely and put into look at the pictures are two androids in works as a other works in a car are friends and they were made at the same they are talking about their lives and what it feels like to be ，please listen carefully to their problems and fill in the ’ll play the tape ：try to fill in the forms as quickly as you can，and then we will check the answers in answers
sally and brenda’s problems
about their jobs
their programmer decided them
about changing their jobs
they are not able to change jobs
about who decides their future
their programmer does
about how they are different from people
they can not smell，laugh，taste，or eat food
about how they are the same as people
they enjoy footballt：from what we have just listened，we know that sally and brenda have some troubles in their are treated you are going to make a list of the rights that androids should have so that they will be treated can work with your partners and have answers： should be able to choose the work they should have their own should be able to change their should be able to decide their own should be able to taste，smell，feel， 5 assignmentt：class，i really appreciate your good performance in this listening can see that your listening has greatly improved since you came to the senior on your good work!ok，we have no time ’d like to assign you some homework to over the listening and writing on page 21 and get ready for the 6 the design of the writing on the blackboard
unit 3 computers
period 4
type of it
advantages
disadvantages
tv
you can both listen and watch.
you can’t write to friends.
web
you can find information.
it’s very expensive.
radio
you can listen to english.
you can not watch.
book
you can get information.
sometimes it is out-of-date.
personal robot
information
size
35 cm
what it looks like
robot with five arms
what it can do
all homework
price
50 yuan a day
bird-like android
information
size
10 cm
what it looks like
bird-like android
what it can do
sings beautifully
price
600 yuan
lonely android
information
size
2 m
what it looks like
large，energetic robot
what it can do
climbs mountains；plays guitar；sings karaoke
telephone number
room-1234step 7 record after teaching
Computer【第四篇】
unit 6 i’m going to study computer science知识点整理
一、词组、短语：
1、grow up 长大，
2、every day每天，
3、be sure about对某事确信，
4、make sure 确信/有把握，
5、send…to…把…发送到…/把…寄…，
6、be able to 能/能够 ，
7、 the meaning of …的意思/含义，
8、 different kinds of 不同种类的，
9、in common通常，
10、 at the beginning of 在…开始的时候，
11、write down写下/记下，
12、 have to do with必须处理某事，
13、take up 开始从事/着手处理/接受，
14、 hardly ever 几乎不，
15、too…to…太而不能
二、习惯用法、搭配
want to do sth. 想做某事，
be going to + 动词原形：将要做某事，
practice doing sth. 练习做某事，
keep on doing sth.继续做某事，
learn to do sth. 学会做某事，
finish doing sth做完某事，
promise to do sth.答应做某事，
help sb. to do sth.帮助某人做某事，
remember to do sth. 记住要做某事，
agree to do sth.同意做某事，
love to do sth.喜欢做某事，
be going to 的用法
1） be going to + 动词原形——表示将来的打算、计划或安排。常与表示将来的tomorrow, next year等时间状语或when 引导的时间状语从句连用。各种句式变换都借助be 动词完成，be随主语有am, is, are 的变换，going to 后接动词原形。
肯定句： 主语 + be going to + 动词原形 + 其他。he is going to take the bus there.
否定句： 主语 + be not going to + 动词原形 + 其他 i’m not going to see my friends this weekend.
一般疑问句： be + 主语 + going to + 动词原形 + 其他
肯定回答： yes, 主语 + be. 否定回答： no, 主语 + be not.
are you going to see your friends this weekend? yes ,i am. / no, i’m not.
特殊疑问句： 疑问词 + be + 主语 + going to + 动词原形 + 其他？
what is he going to do this weekend? when are you going to see your friends?
2) 如果表示计划去某地，可直接用 be going to + 地点
we are going to beijing for a holiday.
3) 表示位置移动的动词，如go , come, leave 等常用进行时表示将来。
the bus is coming. my aunt is leaving for beijing next week.
4) be going to 与 will 的区别：
① 对未来事情的预测用“ will + 动词原形”表达，will 没有人称和数的变化，变否定句要在will 后面加not,
也可用will 后面加 not,或者缩略式won’t, 变一般疑问句将will 提至 句首。
will planes be large in the future? yes, they will. / no, they won’t.
②will 常表示说话人相信或希望要发生的事情，而be going to 指某事肯定发生，常表示事情很快就要发生。
i believe lucy will be a great doctor.
③ 陈述将来的某个事实用will. i will ten years old next year.
④表示现在巨大将来要做的事情用 will. i’m tired i will go to bed.
⑤ 表示意愿用will. i’ll tell you the truth.
⑥ 表示计划、打算要做的事情用 be going to, 而不用 will.
i’m going to buy a computer this month.
---let’s discuss the plan, shall we? ----not now. i ______ to an interview. a. go b. went c. am going d. was going
------jack is busy packing luggage. ---yes. he ____for america on vacation. a. leaves b. left c. is leaving d. has been away
三、重要句子（语法）
what do you want to be when you grow up? i want to be an engineer.
how are you going to do that? i’m going to study math really hard.
where are you going to work? i’m going to move to shanghai.
when are you going to start? i’m going to start when i finish high school and college.
四、词语辨析
1 promise vt. 保证，许诺。有三种结构：
1)promise to do sth. ——my mother promised to buy a piano for me.
2)promise sb. sth. ——my aunt promised me a bike.
3)promise + that 从句——tom promises that he can return on time.
promise n. 允诺， 诺言 lily is a dishonest girl. she never keeps a promise.
与 while 的区别：
when 表示“当…时候”，既指时间点，又指一段时间，when 引导的时间状语从句中的动词可以是终止性的也可以是延续性的。when the teacher came in, the students were talking.
when she arrives, i’ll call you.
while 表示“当…时候”，仅指一段时间，从句中的动作必须是延续性的，一般强调主从句的动作同时发生， while 还可以作并列连词，意为“ 而、却”，表示对比关系。
lisa was singing while her mother was playing piano.
tom is strong while his younger brother is week.
3. practice vt. 练习， 后接名词，代词或v-ing 作宾语。
your elder sister is practicing the guitar in the room.
常跟v-ing 作宾语的动词有：
考虑建议盼原谅：consider, suggest/advise, look forward to, excuse, pardon.
承认推迟没得想： admit, delay/put off, fancy.
避免错过继续练：avoid, miss, keep/keep on, practice.
否认完成能欣赏： deny, finish, enjoy, appreciate.
不禁介意与逃亡： can’t help , mind, escape.
不准冒险凭想象： forbid, risk, imagine.
4. everyday 与 every day 区别
everyday adj. 每天的 在句中作定语，位于名词前。 this is our everyday homework.
every day 副词短语， 在句中作状语，位于句首或句末。 he reads books every day.