文档介绍：2017年6月英语六级语法知识：不定式

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某些及物动词后只能接不定式作宾语，其中最常用的动词有agree,afford, arrange,appear,ask,attempt,care,choose,continue,decide,demand,desire, determine,expect,fail,fear,forget,hate,hesitate,hope,intend,learn,like, love,manage,mean,neglect,offer,plan,prefer,prepare,pretend,promise, refuse,regret,remember,seek,tend,try,volunteer,want,wish等。
What do you plan to do tomorrow?
She hated to move from such a nice village.
In class teachers should try to get feedback from their students

不定式有被动式，当不定式的逻辑主语是这个不定式所表示的动作的承受者，不定式要用被动式，在句中可作主语，宾语，定语，状语，复合宾语等。作定语时，通常表示在谓语动作后将要发生的动作。
The last question to be discussed today is how to do the job more efficiently.
She preferred to be given more difficult work to do.

当不定式的动作发生在谓语动词的动作之前，不定式要用完成式，在句中可作宾语，状语以及构成复合宾语，复合谓语。
She seemed to have heard about the news already.
He was believed to have been a very rich man.

当不定式的逻辑主语是这个不定式所表示的动作的承受者，且不定式的动作发生在谓语动词的动作之前，不定式要用完成被动式，在句中可作主语，宾语或构成复合宾语，复合谓语。
The forest fire is reported to have been put out last night.
It is supposed to have been finished without referring to any reference books.

不定式可以有逻辑主语，其构成形式为“for +代词的宾格(或名词) +不定式”。带逻辑主语的不定式短语可在句子中作主语、宾语、表语或状语等。
It is not easy for you to catch up with them in a short time.
I thin