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知识点二 must与have to
两者都有“必须”之意,但用法有所区别:
(1) must多表示主观需要或责任感的驱使有必要或有义务去做某事,多译为“必须”,而have to 多表示客观存在的环境所限,即客观要求(无奈) 而为之,多译为“不得不干某事”。•
(2) must没有时态的变化,而have to有时态的变化。
(3) must的否定形式为mustn’t,意为“不允许”,表示禁止某人做某事。由must引起的疑问句,肯 定回答要用must或have to,否定回答要用needn’t或don't have to,意思是“不必”。
2. (单项选择)
() (1) —Must I finish my homework before eight o’clock?
—Yes,you.
A. must B. don't have to
C. mustn’t D. need to
() (2) —Must I attend the meeting?
—No,you . You can ask Tom to go instead.
A. must B. don't have to
C. mustn’t D. had to
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知识点一 “疑问词十不定式动词”结构
(1) “疑问词+动词不定式”作动词的宾语。疑问词包括疑问代词who,what,which,whose和疑 问副词 when,where,how。
(2) “疑问词+不定式动词”结构可以在句中充当主语、宾语、表语、同位语等成分。
(3 ) 适用于“疑问词 + 不定式动词”的动词包括:know,see,decide,tell,ask,consider,discover,explain,forget,guess,hear,imagine,learn,remember,think,wonder,understand 等。
(4) 有些动词,如ask,show,tell,advise,inform,teach等,可以先加宾语,然后再接着加上适当的 “疑问词+不定式动词”结构。
(5) —些形容词短语后面也可接“疑问词+不定式动词”结构作宾语,如be sure,afraid,clear等。
1. (单项选择)
() (l) There isn’t any difference between the two. I really don't know .
A. where to choose B. which to choose
C C. to choose what D. to choose which
() (2) I've worked with children before,so I know what in my new job.
A. expected B. to expect
C. to be expecting D. expects
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It seems that everybody tells lies—well,not big lies,but what we call “while lies”. Telling “while lies” isn’t really that bad. Most of the time,people do it because they want to protect a friendship. A survey shows that each person lies about seven times a day. The only real questions are about when we lie and who we tell lies to. Here are some reasons why people tell “white lies”.
◆ Lying to hide something: People often lie because they want to hide something from someone. For example,Paul doesn’t tell his parents that he’s going to play basketball because he doesn,t think they will agree. He tells a lie that he is going to the library to study.
◆ Lying to make someone feel good:Often we don't tell the truth to make someone feel good. For example,your friend cooks dinner for you,but it tastes terrible. Do you say so? No!You probably say ,“Mmm,this is delicious!”
◆ Giving false (错误的) excuses: Sometimes people lie because they don't want to do something. For example,someone invites you to a party. You think it will be boring,so you say you’re busy.
◆ Lying to hide bad news:Sometimes we don't want to tell someone bad news. For example,you have just had a very bad day at work,but you don^ feel like talking about it. So if someone asks you about your day,you just say everything was fine.
阅读短文,回答下列问题。
Why do people tell “white lies” most of the time?
2. Does Paul want to play basketball or study in the library?
3. What will you say to make people feel good although the dish tastes terrible?
4. Telling “white lies” is always bad,isn’t it?
5. How many ways of telling “white lies” are mentioned in the passage?
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