第一单元的重点词汇有：
　　1．switch
　　这个词的意思是“开”，是一个不及物动词。常见的用法有
　　switch on/off相当于turn on/off。比如:
　　Do you mind if I switch on the TV/air conditioner now?
　　He never switches off the computer when he finishes using it.
 
　　第二个意思“转换”，用法如下：
　　Jack worked as a waiter before switching to a singer.
　　Tim can switch easily from English to Chinese.
　　也可以用switch the focus/attention/emphasis… from … to…
 
　　第三个意思是作为名词，意思是“开关”。
　　Please press/flick the switch to turn on the light.
 
　　2. get changed
　　这里面的get是一个系动词，后面的changed表示的是一个状态。这样的用法经常见到。比如：
　　He usually gets bored when he listens to English.
　　Luc got his arm broken in the football game.
　　Lily got her leg caught in the wire.
 
　　get也可以用在doing前面，相当于begin doing。比如：
　　I think we should get going immediately because it is too late now.
　　What are we waiting for? Let’s get moving.
 
　　如果get后面加上不定式，一般来说表示的是gradually begin to do，逐渐开始做…比如：
　　It will take a while for you to get to know everyone in this company.
 
　　3. reduce
　　这个词的意思是to make something smaller or less in size, amount or price… 比如：
　　The president announced a new plan to reduce crime.
　　Small businesses will need to reduce costs in order to survive.
　　The workers have been reduced by half.
　　All the CDs were reduced to $5 each.
　　Benefits will be reduced by $50 for each child who fails to attend school.
　　这个词的名词形式是reduction。
 
　　4. stand
　　这个词除了以前学到的站立的意思以外，还有很多意思。
　　第一个是bear的意思，也就是“忍受”，经常放在名词或动名词前面。
　　I cannot stand bad table manners. 
　　Don’t invite Alice to the party. Mom can’t stand the sight of her.
　　I really cannot stand the way she eats.
　　She can’t stand the thought of losing her son. /She can’t stand thinking about losing her son.
　　The pregnant woman cannot stand people smoking around her.
 
　　第二个常见的短语是stand for, 它指的是“意思是；意味着”。主语经常是一些缩写、标志或者名字。比如：
　　FBI stands for Federal Bureau of Investigation.
　　What does your name stand for?
 
　　5. drive
　　这个词最明显的意思就是“驾驶”。比如：
　　He is driving a BMW（宝马汽车）.
　　Jack promised me to drive me home.
 
　　第二个用法是drive sb. to do sth. 意思是to force or strongly influence someone to do。 比如：
　　The detective wondered what had driven Chris to phone her.
　　The noise from outside has nearly driven me to suicide.
 
　　第三个比较常见的用法就是drive sb. +adj. 这时比较常见的形容词就是：
　　drive sb. crazy/mad/insane/nuts/out of one’s mind…
 
　　最后，drive作为名词表示的是路程。
　　It is a two hours’ drive from here.
　　I want to take you for a drive.
 
　　6. share
　　这个词的意思是to use something together
　　We don’t have enough books, so we have to share.
　　Shall we share the table with you?
　　如果见到share sb’s view/ concern/ belief/ idea…,都相当于have the same opinion.
 
　　7. serve
　　这个词的意思是to give food/ drink to sb.
　　I want to serve the soup with bread.
　　They will serve the breakfast to you.
　　Dinner is served now and you can have it.
 
　　8. offer
　　第一个意思是ask someone if they would like to have sth.
　　Can I offer you something to eat?
　　He likes to offer cigarettes to people around him.
 
　　第二个意思是be willing to do
　　He offered to apologize for the article.
 
　　第三个意思是to provide something that people need or want
　　A number of people offer their services free of charge.
 
　　第四个意思是to say that you are willing to pay something for something else
　　They offered me $4,000 a month.
　　The police are offering a reward for any information. 
 
　　作为名词的offer也是比较常见的。意思为：出价, 提议, 意图。比如：
　　Have you got the job offer?
　　Don’t turn down an offer made by this company.
　　The special offer advertised in the newspaper is not true.
 
　　上次讲了一部分时态的语法。下面是一些练习题。

语法练习　 时态（1）

　　1. Plants _____ just as well as we human beings _____.
　　A. breathe; did　　　B. breathed; did　　 C. breathed; do　　 D. breathe; do
 
　　2. To be loved _____ the happiest thing in the world.
　　A. is　　　　　　　 B. was　　　　　　　 C. will be　　　　　　D. has been
 
　　3. Why _____ you _____ the door quietly when you come in?
　　A. don’t; shut　　B. didn’t; shut　　　C. haven’t; shut　　D. won’t; shut
 
　　4. The bus usually _____ every five minutes at the school gate.
　　A. started　　　　 B. has started　　　　　 C. starts　　　　 D. will start
 
　　5. As soon as he earns any money, he _____ it.
　　A. spend　　　　　 B. spends　　　　　 C. spent　　　　　 D. is spent
 
　　6. My dog _____ a lot, but he _____ at the moment.
　　A. barks; doesn’t bark　　　　　　　　　　　 B. is barking; doesn’t bark
　　C. is barking; isn’t barking　　　　　　　　 D. barks; isn’t barking
 
　　7. Once it _____ raining, we will leave for the park.
　　A. will stop　　 　　 B. stopped　　　　　　 C. is stopping　　　　　D. stops
 
　　8. The summer vacation _____ on June 20, which is 2 weeks from now. 
　　A. starts　　　　　B. is starting　　　　　C. has started　　　　　D. started
 
　　9. Even if John _____ hard, he won’t pass the exam.
　　A. studied　　　　 B. is studying　　　　 C. studies　　　　　 D. will study
 
　　10. I _____ she will like the gift I bought for her.
　　A. hopes　　　　　 B. hope　　　　　　 C. is hoping　　　　　 D. will hope
 
　　11. It _____ in the Bible, “Thou shalt not steal!”(You shall not steal!)
　　A. said　　　　　　 B. is saying　　　　　 C. says　　　　　 D. has said
 
　　12. The earth _____ around the sun.
　　A. moves　　　　　 B. is moving　　　　　 C. has moved　　　　　 D. moved
 
　　13. The leaves _____ in the wind and rain.
　　A. are moving　　　 B. move　　　　　　　 C. have moved 　　　 D. moved
 
　　14. ---- What are you doing?
　　　　---- I _____ my shirt to see if I can wear it for another day.
　　A. will smell　　　　 B. smell　　　　　 C. have smelt　　　 D. am smelling
 
　　15. He often _____ when he _____.
　　A. whistles; is walking　　　　　　　　　 B. is whistling; walks
　　C. is whistling; is walking　　　　　　　 D. whistles; walks

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