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必修四Unit2动词-ing形式作主语和宾语

必修四Unit2动词-ing形式作主语和宾语
必修四Unit2动词-ing形式作主语和宾语

必修四Unit2动词-ing形式作主语和宾语

动名词作主语时,句子有三种形式:

①动名词直接置于句首主语的位置上。

Playing tricks on others is something we should never do.

②用形式主语it,把真正作主语动的名词结构移置句尾。但这种句子形式有一定的限制,作表语的只能是某些形容词或少数名词,如useful, useless, good, fun, no use, worth等。如:It’s worth making the effort. 这事值得去做。

It is useless trying to argue with Shylock. 和夏洛克争辩是没有什么用的。

Is it any good trying to explain? 想再解释一次有好处吗?

It is pleasant working with you. 跟你在一起工作是令人愉快的。

③在there be结构中作主语,这种结构的意思相当于“It is impossible to do…”如:

There is no hiding of evil but not to do it. 若要人不知,除非己莫为。

Here is no joking about such matter. 这种事开不得玩笑。

There was no knowing when he would leave. 无法知道他什么时候离开。

动名词作主语与不定式作主语的区别

动名词表示的动作通常是一个泛指的动作,不定式则通常表示具体的动作。如:

As a child, she felt that visiting sick people was a duty and a pleasure.

还是个孩子的时侯,她就觉得探视病人是一种责任,也是一种愉悦。

To be a guest in an American home will be a good experience for me.

到美国人家里做客对我来说将是一个极好的经历。

Doing nothing is doing ill. 一直不做就是作恶。

He said, “To go on like t his is no use.”他说:“继续这样下去是无用的。”

注:在实际运用中,一般两者可以互换,差异不大,但下列情况不能互换。

There is no need to do sth 干……没必要,在此句式中to do不可换为doing,如:

There is no need to tell her. 没有必要告诉她。

而在It’s important … / It’s necessary … / It’s advisable … / It’s essential … / It’s fitting …这类句型中,只能用不定式,如:

It’s important to learn foreign languages.It’s quite necessary to read it many times.

常用-ing形式作主语的句型有:

It +be +a waste of time doing 做……是浪费时间的

It is/was no good/use doing 做……是没用处的

It is/was hardly/scarcely worth doing 做……不值得

It is/was worth/worthwhile doing 做……是值得的

There is no doing 无法……,不允许……

There is no sense in doing 做……没有道理

There is/was no use doing 干……无意义

There is/was nothing worse than doing 没有比……更糟的

There is/was no point doing 干……无意义

提示:当动名词用作主语时,其逻辑主语由形容词性物主代词和名词所有格构成。

My sister's being ill made we worried.

Y our being right doesn't necessarily mean my being wrong.

作宾语

动名词作宾语有两种情况。一是有些动词只能后接动名词作宾语;二是有些动词既可后接动名词也可后接不定式作宾语。

①只能后接动名词作宾语的动词,常见的有avoid, consider, enjoy, keep, finish, suggest, dislike, delay, escape, cannot help, imagine, mind, miss, practice, cannot stand等。如:

I can’t avoid going. 我不能不去。

Have you considered looking for one special friend? 你是否考虑过找一位挚友?

We must try to avoid repeating the same mistake. 我们必须设法避免犯同样的错误。

Do you feel like having a walk with me after supper? 晚饭后你想和我一起散步吗?

People couldn’t help laughing at that foolish man. 人们忍不住嘲笑那个愚蠢的人。

这类动词还有:excuse,fancy,give up,put off,risk等。

②既可接动名词又可接不定式作宾语的动词,常见的有:begin, start, continue, like, love, prefer, by, mean, forget, remember, hate等。

●在like, love, hate, prefer等动词之后,用-ing或不定式意义上没有什么不同,只是侧重点有些不同,动名词表示泛指的动作,不定式表示具体的一次性动作。

●在begin / start, continue之后,用动名词和不定式,意义无甚区别,尤其是当主语是人的时候。

●在动词forget, remember, regret之后,用动名词与不定式意义不同。动名词表示动作先于谓语发生,不定式表示后于谓语动作,如:

I remember posting the letter. 我记得我已把信寄了。

I’ll remember to post the letter. 我会记着去寄信的。

●在try, mean之后,意义各不相同,如try to do(设法),try doing(试试),mean to do (打算,有意要做),mean doing(意思是,意味着)。如:

We must try to get everything done in time. 我们必须设法及时把一切搞好。

Let’s try doing the working in some other way. 我们用别的方法做这工作试试。

●go on doing和go on to do

go on doing继续做一直在做的事;go on to do接着做另一件事。如:

Please go on doing the same exercise. 请接着做这同一个练习。

Please go on to do the other exercise. 请做另外一个练习。

●stop doing和stop to do

Stop doing停止做,stop to do停下正在干的事去干另一件事。如:

We stopped talking. 我们停止了交谈。We stopped to talk. 我们停了下来去谈话。

作介词宾语:动名词可与介词一起构成介词短语。

●介词+动名词,如:

We’ve got to think of ways of changing people’s habits. 我们得想些法子改变人们的习惯。

●动词+介词+动名词,如:

I insist on taking proper food fort his expedition. 我坚持为这次出行带足需要的食物。

注:下列短语中的to都是介词,所以后面跟名词或-ing形式:devote to, object to, pay attention to, get down to, lead to, look forward to, stick to, be used to等

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