初中英语语法非谓语动词的讲解

初中英语语法——非谓语动词的讲解

非谓语动词指的是在句中起名词，形容词或副词作用的动词形式，而不是作谓语的动词形式。动词的非谓语形式分为动名词，分词，动词不定式。

Climbing mountain is a good exercise. (Climbing..., 动名词起名词作用）

Do you know the man wearing a white shirt. （wearing ..分词起形容词作用）He gets up early to catch the first bus. (to catch ...不定式起副词作用)

谓语动词和非谓语动词的区别：

1) 谓语动词在句中可单独作谓语，而非谓语动词不能单独作谓语。

Miss Mary teaches us English. 玛丽教我们英语。（teaches 动词作谓语）Mr. Li came to our classroom to have a talk with us last week.

（to have a talk.... 不定式作状语）

2) 谓语动词受主语的人称和数的限制，而非谓语动词形式没有这种限制。Mike likes the pop music. （动词用单数第三人称形式）

Lucy has nothing to do today。（do 用原形）

非谓语动词的特征：

1 如果非谓语动词是及物动词，后面须跟宾语。

Studying English is my favorite.（studying 后跟宾语）

To help him is my duty. 帮助他是我的责任。（help 后跟宾语）

2 非谓语动词可以带有自己的状语或逻辑主语。

Working under such a condition is terrible. (under such a condition 是 working 的状语）

It's too difficult for him to master English in such a short time. （for him 作不定式的逻辑主语）

3 非谓语动词仍有语态和时态的变化。

I am sorry to have kept you waiting long.（to have kept...是不定式的完成形式）Seen from the mountain, the city looks much more beautiful. （Seen from...是分词的被动形式）

4 非谓语动词在句中可以当成名词或者形容词来使用。

Our coming made him happy.（coming 起名词作用）

There are two big swimming pools here. (swimming 起形容词作用)

非谓语动词的形式变化：

不定式主动被动

一般 to write to be written

进行 to be writing

完成 to have written to have been written

完成进行 to have been writing

现在分词主动被动

一般 writing being written

完成 having written having been written

过去分词主动被动

一般 written

动名词主动被动

一般 writing being written

完成 having written having been written

●动词不定式：

动词不定式是由 to + 动词原形构成，在句中起名词，形容词和副词的作用，可以担任除谓语以外的其它任何成分。

1. 动词不定式作主语：

To mast a language is not an easy thing.

To teach English is my favorite.

It's my pleasure to help you.

动词不定式作主语时可以放在后面，而用 it 作形式主语放在原主语的位置上。

It's very kind of you to have given us much help.

你给了我们那么多的帮助真是太好了。

It's necessary to find the witness. 有必要找到目击者。

2. 动词不定式作宾语：

某些及物动词可以用动词不定式作宾语，这些动词有decide, begin, help, begin, want, wish, like, forget, learn, ask.

What I wish is to learn English well.

I like to help others if I can.

3. 动词不定式作宾语补语。

We expect you to be with us. 我们希望你和我们在一起。

Please ask him to come here quickly.请叫他快过来。

4. 动词不定式作表语：

What I should do is to finish the task soon. 我应该做的是赶快完成任务。

The most urgent thing is to find the boy immediately. 当务之急是马上去找孩子。

5. 动词不定式作定语：

There are many ways to solve the problem. 有许多方法能解决这个问题。

I have something important to tell you. 我有重要的事情要告诉你。

6. 不定式作状语：

We went to the hospital to see our teacher. 我们去医院看了我们的老师。

She is making a test to get a kind of useful medicine from a Tibet flower.

她在做试验，从一种西藏花中提取某种有用的药物。

动词不定式的否定形式：

not + to + 动词原形

The teacher told us not to swim in that river.

老师告诉我们不要在那条河里游泳。

It's unfair not to tell us. 没告诉我们真是不公平。

带疑问词的不定式：

疑问词who, what,which,when, where, how, why 可以加在不定式的前面，构成不定式短语，使含义更加具体。

Where to go is not known yet.去什么地方还不知道。

I don't know when to begin. 我不知道什么时间开始。

Can you tell me where to get the battery.

你能告诉我哪儿能买到电池吗？

Do you know how to get to the station. 你知道怎样去车站吗？

带逻辑主语的不定式：

动词不定式可以带有自己的逻辑主语，构成方法是： for + 逻辑主语 + 不定式。