在句子中充当除谓语以外的句子成分的动词形式叫做非谓语动词。非谓语动词分为三种形式:动名词，不定式和分词（分词包括现在分词和过去分词）。
1）动名词
时态\语态 主动 被动
一般式 doing being done
完成式 having done having been done
一般式：
Seeing is believing. 眼见为实。
被动式：
He came to the party without being invited．他未被邀请就来到了晚会。
完成式：
We remembered having seen the film. 我们记得看过这部电影。
完成被动式：
He forgot having been taken to Guangzhou when he was five years old.
他忘记五岁时曾被带到广州去过。
否定式：not + 动名词
I regret not following his advice. 我后悔没听他的劝告。
复合结构：物主代词（或名词所有格）+ 动名词
He suggested our trying it once again. 他建议我们再试一次。
His not knowing English troubled him a lot.
他不懂英语给他带来许多麻烦。
2）不定式
时态\语态 主动 被动
一般式 to do to be done
完成式 to have done to have been done
一般式：不定式的一般式所表示的动作与谓语动词动作同时发生或发生在谓语动词动作之后.
It's nice to meet you.很高兴见到你。
He seems to know a lot. 他看起来懂得很多。
We plan to pay a visit. 我们计划去参观。
He wants to be an artist. 他想成为一个艺术家。
The patient asked to be operated on at once. 病人要求马上手术。
The teacher ordered the work to be done. 老师要求完成工作。
进行式：不定式的进行式所表示的动作与谓语动词动作同时发生，例如：
The boy pretended to be working hard. 男孩假装工作得很努力。
He seems to be reading in his room. 看起来他正在他的房间里面读书。
完成式：不定式的完成式表示的动作发生在谓语动词动作之前，例如：
I regretted having told a lie. 我后悔我说谎了。
I happened to have seen the film. 我偶然看过这部电影。
He is pleased to have met his friend. 他很高兴能遇上他的朋友。
3）分词
时态\语态 主动 被动
一般式 doing being done
完成式 having done having been done
否定形式： not +不定式， not + 动名词， not + 现在分词
现在分词
In the following years he worked even harder.
在后来的几年中，他学习更努力了。
The man speaking to the teacher is our monitor's father.
正与老师谈话的那个人是我们班长的父亲。
过去分词
Our class went on an organized trip last Monday.
上周一我们班开展了一次有组织的旅行。
Those selected as committee members will attend the meeting.
当选为委员的人将出席这次会。
