动词不定式

动词不定式有两种形式：带to不定式
不带to不定式
He decided not to do it.
Let’s not decide now.
一.动词不定式时态与语态
主动语态 被动语态
一般式 : to make to be made
进行式 : to be making
完成式: to have made have been made
I am sorry to have kept you waiting.
No harm seems to have been made.
This is a day never to be forgotten
1.不定式作目的状语
The cats and dogs sleep together to keep warm.
He went to France to study French.
2.不定式作结果状语
He arrived at the cinema only to find that he had seen the film before.
He was too excited to sleep.
3.不定式作宾语
I asked to see the manager.
He wants to be left alone.
4.不定式作宾语补足语
The doctor advised him to take a good rest.
I heard him sing in the next room.
We felt the house shake.
I will have you know that I am a qualified engineer.
注意不带的to不定式
feel sb. do sth see sb. do sth
hear sb.do sth make sb.do sth
let sb.do sth have sb.do sth
5. 疑问词+不定式
When to start hasn’t been decided.
I don’t know what/which/who to choose.
I wondered how/when/where to get in touch with him.
The difficulty is what to call our dog.
6.不定式作表语
Your mistake was to write the letter.
This house is to let.
All I did was to press the button