(1) 动名词的一般式所表示的动作与谓语动词所表示的动作同时发生，或在谓语动词表示的动作之后。如：

We are very interested in collecting stamps.

我们对集邮很感兴趣。

His coming will be of great help to us .

他来对我们大有帮助。

* 但是有些明确表示时间的动词和介词　after, on,upon, 或for之后，常用一般式代替完成式，表示动作发生在谓语动作之前。如：

I shall never forget seeing the Great Wall for the first time.

我永远不会忘记第一次看到长城的情景。

On hearing that bad news , the mother couldn’t help crying.

一听到这个糟糕的消息，母亲就禁不住哭了起来。

Excuse me for coming late.

我来晚了，请原谅。

Thank you for giving us so much help.

谢谢你给了我们这么多帮助。

(2) 动名词的完成式所表示的动作或状态在谓语动词之前完成或结束。

He regrets not having taken part in the work.

他后悔没有参加这项工作。

We were praised for having finished the work ahead of time.

我们因提前完成了这项工作而受到了表扬。

(3)动名词的被动式：当动名词的逻辑主语是行为承受者时，用被动语态。如：

I like being given harder work.

我喜欢接受难点的工作。

She is proud of being admitted into the university.

她为被大学录取而感到自豪。

The meeting was put off without his having been consulted.

会议延期并未和他商量。

He doesn’t mind having been criticized.

他不介意过去受到的批评。