《高二英語語法精講 不定式》由出國留學網(wǎng)liuxue86.com編輯整理。本內(nèi)容整理時間為05月12日，如有任何問題請聯(lián)系我們。
不定式既具有動詞的一些特征，又具有名詞，形容詞和副詞的句法功能
否定式：not +不定式
不定式的時態(tài)
一般說來，不定式一般式表示的動作有時與限定動詞表示的動作同時發(fā)生，也有時發(fā)生在限定動詞表示的動作之后。如：
Who heard him say that?
He seems to know this.
I hope to see you again.
不定式進行式表示動作正在進行，通常與限定動詞表示的動作同時發(fā)生，如：
They are said to be building another bridge across the river.
I happened to be going that way too.
不定式完成式表示的動作發(fā)生在限定動詞表示的動作之前，如：
I am sorry to have given you so much trouble.
I am glad to have seen your mother.
不定式的句法功能
(1)作主語
To talk with him is a great pleasure.
不定式短語作主語時，為了保持句子的平衡，往往以it作形式主語，而把不定式短語置于謂語動詞之后，如：
It’s nice to hear your voice.
(2)作表語
Her wish is to become an artist.
(3)作賓語
常用于及物動詞: want , hope, wish, like, need, hate, offer, prefer, begin, start, attempt, decide, determine, expect, promise, pretend, refuse ,afford, manage, help等之后，如：
You should continue to learn as long as you live.
注1：如果作賓語的不定式又有自己的補語，則須用先行詞it 作形式賓語，而將真正的賓語不定式后置，如：
They found it impossible to get everything ready in time.
注2：不定式一般不能作介詞的賓語，只有在極少數(shù)介詞如:but, except等后邊才行。此時不定式可以帶to或不帶to,如：
In very cold winter weather a cold-blooded animal has no choice but to lie down and sleep.
There was nothing left to do but clean the windows.(前邊有do, to 省略)
但“疑問詞+不定式”結(jié)構(gòu)可以作介詞的賓語，如：
I have no idea about what to do next.
《高二英語語法精講 不定式》由出國留學網(wǎng)liuxue86.com編輯整理
不定式既具有動詞的一些特征，又具有名詞，形容詞和副詞的句法功能
否定式：not +不定式
不定式的時態(tài)
一般說來，不定式一般式表示的動作有時與限定動詞表示的動作同時發(fā)生，也有時發(fā)生在限定動詞表示的動作之后。如：
Who heard him say that?
He seems to know this.
I hope to see you again.
不定式進行式表示動作正在進行，通常與限定動詞表示的動作同時發(fā)生，如：
They are said to be building another bridge across the river.
I happened to be going that way too.
不定式完成式表示的動作發(fā)生在限定動詞表示的動作之前，如：
I am sorry to have given you so much trouble.
I am glad to have seen your mother.
不定式的句法功能
(1)作主語
To talk with him is a great pleasure.
不定式短語作主語時，為了保持句子的平衡，往往以it作形式主語，而把不定式短語置于謂語動詞之后，如：
It’s nice to hear your voice.
(2)作表語
Her wish is to become an artist.
(3)作賓語
常用于及物動詞: want , hope, wish, like, need, hate, offer, prefer, begin, start, attempt, decide, determine, expect, promise, pretend, refuse ,afford, manage, help等之后，如：
You should continue to learn as long as you live.
注1：如果作賓語的不定式又有自己的補語，則須用先行詞it 作形式賓語，而將真正的賓語不定式后置，如：
They found it impossible to get everything ready in time.
注2：不定式一般不能作介詞的賓語，只有在極少數(shù)介詞如:but, except等后邊才行。此時不定式可以帶to或不帶to,如：
In very cold winter weather a cold-blooded animal has no choice but to lie down and sleep.
There was nothing left to do but clean the windows.(前邊有do, to 省略)
但“疑問詞+不定式”結(jié)構(gòu)可以作介詞的賓語，如：
I have no idea about what to do next.
《高二英語語法精講 不定式》由出國留學網(wǎng)liuxue86.com編輯整理