to do不定式用法总结

一、动词不定式做主语

动词不定式做主语，一般用it作形式主语，不定式后置，具体的句型为Its adj/noun (for sb) to do

Its a pity for you to drop out of school.

= For you, to drop out of school is a pity.

真遗憾，你竟然辍学了。

扩展资料

It's a pleasure for me to be your guest.

= For me, to be your guest is a pleasure.

很荣幸得到你的邀请。

It's a good plan for you to make more friendships.

= For you to make more friendships is a good plan.

广交朋友是个好办法。

It's a good idea for you to eat less fried food

= For you to eat less fried food is a good idea.

你少吃点油炸食品是好想法。

It was difficult to answer the question.

这问题很难回答。

It looked impossible for me to finish on time.

我似乎不可能按时完成了。

It was stupid of him to press the emergency button.

他按了紧急按钮，这真愚蠢。

如果形容词既可以修饰句子中的.人，也可以修饰句子中的不定式，人前要用“of”

二、动词不定式做宾语

1. 谓语动词＋动词不定式（多数动词属于此类动词）

Some students hate to study English.

有些学生不喜欢研读英语。

You need to study in a quiet place.

你必须在安静的地方读书。

He likes to go to the movie.

他喜欢去看电影。

She wants to help Mary.

她想要帮助玛丽。

She pretended not to go.

她假装不去。

He pretended to be a good man.

他假装是好人。

They agreed to have a meeting the next week.

他们同意下星期开会。

They stopped to have a rest.

他们停下来休息。（停下去做）

I have stopped smoking for half a year.

我已经半年不抽烟了。（停止做）

She remembered to surf the internet to get information.

她记得上网查信息。（记得要做）

I remembered bringing my homework.

我记得带作业了。（记得做过）

We happened to meet at the station.

我们碰巧在火车站相遇。

2. 系表结构+动词不定式

glad，sorry，happy，sad，surprised，troubled等与情绪有关的形容词后常用动词不定式。

I am glad to see him.

我很高兴看到他。

Sue was troubled to see trash everywhere.

苏看到到处是垃圾很苦恼。

Sara was excited to see the rock band.

莎拉看到摇滚乐团很兴奋。

His health is likely to get worse.

他的健康可能会恶化。