4、动词的非谓语形式。例如:

1)--- What should we do with the empty bottles?

--- Our teacher advises _______ them.

  A. to sell  B. selling  C. having sold  D. sell

答案是B。advise的常用结构是advise sb to do sth,但没有sb作宾语时,结构即为:advise doing。用于此类用法的词还有:allow, permit等。有些动词后面是固定用doing的,如:imagine, suggest, mind等。有些动词短语也是固定接doing的,如:pay attention to, get down to, devote oneself to等。以上几类词或短语要在复习时注意总结和归纳。

2)Who do you think would be able to solve the problem _______ now?

   A. discussed  B. to be discussed   C. having been discussed  D. being discussed

答案是D。本题选项中罗列了四种非谓语动词的常见形式,特意免除了对被动语态的考查,同学们可以从中清楚地看出非谓语形式作定语的几种情况:to do 表示将要去做某事;doing表示正在做某事;having done表示已经做完某事;done 表示某事已被做完。同学们如能牢记这四种情况的基本意思,并细心体会语境,就能在类似题目的解题过程中得心应手了。

3)_______ from behind, the girl in white looks like an angel.

   A. Seen   B. Seeing     C. To see   D. Having seen

答案是A。此题考查非谓语动词用作状语的情况。此时to do表示目的;doing表示正在进行的伴随情况,与主语间是主动关系;having done表示已经完成的伴随情况,与主语间是主动关系;done表示已经完成的伴随情况,与主语间是被动关系。此类题目的解题关键是判断主语与可选动词间是主动还是被动关系,以及动作是在进行还是已经完成。

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