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情態(tài)動(dòng)詞的回答方式

問句   肯定回答    否定回答
need you…?  yes, i must.   no,i needn't
must you…?           /don't have to.

典型例題
1)---could i borrow your dictionary?
  ---yes, of course, you____. 
  a. might b. will  c. can  d. should
  答案c.could表示委婉的語氣,并不為時(shí)態(tài)。答語中of course,表示肯定的語氣,允許某人做某事時(shí),用can和 may來表達(dá),不能用could或might。復(fù)習(xí): will 與you連用,用來提出要求或下命令。should與you 連用,用來提出勸告。

2)---shall i tell john about it?
  ---no, you ___. i've told him already.  
  a. needn't  b. wouldn't  c. mustn't  d. shouldn't
  答案a。needn't 不必,不用。 wouldn't 將不, 不會(huì)的。 mustn't 禁止、不能。 shouldn't 不應(yīng)該。本題為不需要,不必的意思,應(yīng)用needn't。

3)---don't forget to come to my birthday party tomorrow.
  ---______.
  a. i don't  b. i won't  c. i can't d. i haven't
  答案b. will既可當(dāng)作情態(tài)動(dòng)詞,表請(qǐng)求、建議、也可作為實(shí)義動(dòng)詞表"意愿、意志、決心",本題表示決心,選b。