专题八 │ 正面解读 情态动词 意义

　　例句

　　备注

　　will/would 表示功能(能，行)

　　①If you don't have a pen, a pencil will do.②We tried the door again，but it wouldn't open.

　　与否定词连用常表示“拒绝”。

　　表示推测(可能、大概)

　　①This will be the house you are looking for. ②I would be about ten when my father left home. 三、情态动词＋have done

　　专题八 │ 正面解读 情态动词 意义

　　例句

　　备注

　　must have done；may/might have done；can/could have done 一定(肯定句)；可能(肯定句和否定句)；可能(疑问句和否定句) You can't/couldn't have met my grandmother. She died before you were born.

　　对过去的事情的推测

　　might have done; couldhave done；would have done 本来可能做……而未做；本可以做……而未做；本来会做……而未做 ①He might have given you more help, even though he was very busy.②We could have walked there, and it was so near. 与过去事实相反的虚拟表达

　　专题八 │ 正面解读 情态动词 意义

　　例句

　　备注

　　should/ought to have done 本应该做……而未做

　　Your brother has failed English exam again. You ought to have given him more help.

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