Question

【題目】"He ________ lived well on his good looks, but instead he chose to thrive(成功) on his talent." People praised Ning Zetao like this.

A. should haveB. must haveC. might haveD. could have

Answer 1

【答案】D

【解析】

試題分析：考查情態(tài)動詞。句意：以他的外表他本來能生活的更好，但是相反，他選擇依靠他的才華成功。could have done本來能做而沒有做。故選D。

【知識歸納】

情態(tài)動詞have done的用法講解

1、can have done的用法 can have done用于對過去動作的推測，表示“可能”，常用于否定句和疑問句。She can't have gone to work. It's Sunday.她不可能去上班，今天是星期日。

2、must have done的用法 must have done用于對過去動作的推測，表示"可能一定……"，用于肯定的陳述句中。I have not seen him for quite a long time. He must have been very busy.我很久沒見他了，他一定很忙。

3、may have done的用法 may have done用于對過去動作的推測，表示 "或許;可能"，多用于肯定句和否定句。She is late. She may have missed the bus.她遲到了，她可能沒趕上車。

4、ought to/should have done的用法 ought to/should have done的肯定形式表示"過去應該做的事而沒有做"，其否定形式表示 "過去不該做的事卻做了"，含有批評的意思。Jenny should have kept her word. I wonder why she changed her mind. 詹妮應該信守諾言。我不知道她為什么改變了主意。

5、need have done的用法 need have done一般多用于否定句或疑問句中，表示 “本來不必做的事卻做了”。You needn't have told that to him.你本來沒有必要把那事告訴他。(實際卻告訴了)

You needn’t have hurried.你本來不必這么匆忙。(卻忙了一陣子)

There was plenty of time. She needn’t have hurried. 還有時間，她沒必要如此匆忙。

6、could have done的用法 could have done表示對過去動作的推測，作用和can have done相同，但表達的可能性較小或說話人更加不肯定。John could have overslept again.約翰可能又睡過頭了。

7、might have done的用法 might have done表示程度上比may更小的可能性。He might have arrived home by now. Let's ring him up again.現(xiàn)在他可能已經(jīng)到家了，我們再給他打一次電話吧。

巧記表“推測”的情態(tài)動詞用法

表“推測”時，情態(tài)動詞可用can,could,may,might,must。must表“一定”，只用于肯定句，其否定形式要用can’t;may(might)表“或許”，可能性較小，不用于疑問句;can表“可能”，不用于肯定句。

為方便記憶，可用一句話來記憶，即：肯(can)不肯?妹(may)不問，媽媽(must)肯定不否問�！翱�(can)不肯”即can不用于肯定句;“妹(may)不問” 即may不用于疑問句;“媽媽(must)肯定不否問” 即must只用于肯定句,而不用于否定句和疑問句中。