非谓语动词
非谓语动词就是非谓语的动词。
what is 非谓语动词？
例句：To speak good English is not easy.
speak good English 有动作的含义，但在例句中没有做谓语（此例句的谓语是is）它充当了主语的位置。
非谓语动词不仅可以用作主语，还可以用作宾语、宾语补足语、表语、状语、定语。
总结：不是谓语的位置，却有动词的含义
非谓语动词有以下形式：不定式、动名词
不定式
定义：具有名词、形容词及副词性质并具有时态、语态变化。
形式：to do
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用作主语：
To speak good English is not easy.
It took me an hour to do the work.
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用作宾语
She decided to take the examination.
I hope to meet him soon.
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宾语补足语
They expected us to help them.
He wants his son to study hard.
不定式作宾补，如谓语动词是感官动词、使役动词，则不定式负号“to"需省略，但在被动语态中不能省略。
I heard them sing in the classroom.
I made her clean the room.
The girl is heard to sing an English song.
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用作表语
To teach is to learn.
His job is to sell cars.
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用作状语，表示目的，结果。
We come to school to study English.（目的）
I hurried to store, only to find it closed.（结果）
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定语：不定式短语作定语须位于名词之后。
He asked for a piece of paper to write it on.
= to write it on the piece of paper.
The poor man has no house to live in.
= to live in the house
Have you anything to do?
= to do anything
动名词
即动词名词化。
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主语
Saving is easier than doing.
His coming here will be a great help.
It is no use waiting here, he has left.
It is no good smoking.
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表语
His job is keeping the hall clean as possible.
Seeing is beliving.
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宾语
a. 动词宾语：
He admitted taking the book.
I do mind your smoking here.
下列动词必须跟动名词作宾语：
admit, appreciate, avoid, complete, delay, deny, enjoy, fancy, finish, mind, practice, resent, risk, allow, permit…
b. 作介词宾语：
He left without saying goodbye to us.
I’m looking forword to meeting you.（to在这里作介词）
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定语
reading room
swimming pool
walking stick
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动名词复合结构：由名词所有格或物主代词与动名词构成。
His leaving is a great loss.
Mother dislikes my (me) working late.
John’s having seen her did not make her worried.
分词
分词的用法：
- 定语
时态上：现在分词+ing，过去分词+ed
动词修饰名词时：
a sleeping baby.
boiled water/ fallen leaves
The changed world/ the risen sun
看动作的主被动关系，主动+ing，被动+ed。
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表语
The book is insteresting.
He is interested the book.
The news is exciting.
He feels excited.
修饰物+ing，修饰人+ed
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宾语补足语
When I woke up, I found my mother sitting beside me.
I’d like to have this package weighed.