动词作主语的用法

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动词作主语的用法

动词作主语的用法
动词作主语的用法

动词作主语的用法
非谓语动词可以作主语,如不定式,动名词,作主语时谓语常用单数.

一、动名词做主语:往往表示经常性、习惯性的动作,在口语中也表示具体的动作。如:
Seeing is believing.眼见为实。
Heling her is my duty.帮助她是我的责任。
二、动词不定式做主语:动词不定时为非谓语动词,做句中不能充当谓语,但是可以做主语,表语,宾语,定于和状语。动词不定式做主语主要分为两种:
(1)动词不定式直接做主语。

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一、动名词做主语:往往表示经常性、习惯性的动作,在口语中也表示具体的动作。如:
Seeing is believing.眼见为实。
Heling her is my duty.帮助她是我的责任。
二、动词不定式做主语:动词不定时为非谓语动词,做句中不能充当谓语,但是可以做主语,表语,宾语,定于和状语。动词不定式做主语主要分为两种:
(1)动词不定式直接做主语。
Eg. To see is to believe 眼见为实
To help others is to belp ourselves. 帮助别人就是帮助自己
(2)用 it作为形式主语,真正的主语为放在后面的动词不定式。
It is very kind of you to help us.
It is important to read English every morning.
It's our duty to take good care of the old.
It took us three days to arrive at the city we would visit .
前两个句子的句型为 It is + adj+ for sb /of sb+ to do sth. 如果形容词为difficult,easy,hard,important,impossible,necessary 等修饰动词不定式则用介词for;
如果形容词为careless,clever,good,foolish,honest,kind,lazy,nice,right,silly,stupid,wise等 修饰人则用介词 of .
It is easy for us to get lost in the city Beijing.
It is necessary for us to leave a good impression on others when we first met.
It is silly of us to believe him
It is clever of her to work out the problem in two minutes .
注意:系动词 seem, appear 也使用于此句型 It seems silly of us to believe him.
不定式做主语谓语动词用单数。 To be kind to the enemy is to be kind to the people
不定式做主语的时候往往用平行结构。(即前后形式一致,主语是不定式,表语也要用不定式;主语是动名词,表语也要用动名词。) To see is to believe . Seeing is believing .
不知道你清楚没有。如果还不太懂,欢迎提问。希望对你的学习有帮助!

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将动词变成非谓语(现在分词ing,过去分词done,不定式to do)。