2. —The light in the office is still on.

—Oh, I forgot _____.

A. turning it off         B. turn it off

C. to turn it off          D. having turned it off

3. —You were brave enough to raise objections at the meeting.

—Well, now I regret ______ that.

A. to do                    B. to be doing

C. to having done       D. having done

4. —I regret ____ that I can’t help you.

—That’s all right.

A. say                       B. to say                   C. saying                  D. said

在表示已發生的動作時, 若句中含有具體的過去時間狀語, 則以用動名詞的一般式為宜：

I regret telling you about it yesterday. 我后悔昨天把此事告訴了你。

答案：1. C 2. C 3. D 4. B

7. stop等動詞后接不定式或動名詞含義不同

He was very tired so he stopped ______ a rest.

A. have                    B. to have                C. having                 D. to having

此題應選B。在動詞stop(停止), go on(繼續)等之后, 接不定式或動詞的-ing形式都可以，但含義有差別：stop之后若接不定式, 表示停止正在做的事情而去做另外一件事(即去做不定式表示的動作);若接動詞的-ing形式, 則只表示停止正在做的事情(即停止-ing動詞所表示的動作)；go on 之后若接不定式，表示的是做完一件事情后, 接著做另外一件事(即做不定式所表示的動作)；若接動詞的-ing形式, 則表示繼續做正在做的事(即繼續做-ing動詞表示的動作)。如：

1. He reached the top of the hill and stopped ___ on a big rock by the side of the path.

A. to have rested        B. resting                  C. to rest                  D. rest

2. They stopped ____, but there was no more sound.

A. listen                    B. listening                C. to listen                D. to have listened

3. When he saw us, he stopped____, got up and shook hands with us.

A. to read                  B. reading                 C. read                     D. to be reading

4. You can’t go on ____ all night without a rest.

A. to work                B. working                C. work                    D. to have worked

5. Go on _____ the other exercises after you have finished this one.

A. to do                    B. doing                    C. with                     D. to be doing

答案：1. C 2. C 3. B 4. B 5. A

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