一感觉”。例如：

Let's （to）go！走吧！ He saw the thief （to）steal a lady’s cellphone.

注：改为被动句时要把to还原，例如：

The thief was seentosteal a lady’s cellphone.

6．不定式的省略。下列短语中，如果意义明确，常常省略到to。

want to,wish to,hope to,like to,hate to,plan to,try to,love to,have to,ought to,need to,used to,be able to

7．不定式作定语，应注意两种关系：

1）动宾关系：

He has a lot of meeting to attend . Please lend me something to write with .

He is looking for a room to live He is looking for a room to live in . He has no money and no place to live ( in ) .

I think the best way to travel ( by ) is on foot .

There is no time to think ( about ) .

2）主谓关系：

She is always the last ( person) to speak at the meeting .

----I’m going to the post office,for I have a letter to post . ( 逻辑主语是I )

-------Thank you. But I have no letters to be posted now ( 逻辑主语不是I )

7．不定式作状语，可以有以下几种意义：

1）原因

He is lucky to get here on time . 这种结构中常用的形容词有：

happy,glad,delighted,pleased,sorry,eager,anxious

lucky,fortunate,proud,angry

.

surprised,frightened,disappointed,ready,clever,foolish,worthy

2) 目的

He came to help me with my maths .

3) 结果

I hurried to get there only to find him out .

The book is too hard for the boy to read .

He is old enough to go to school . 8 .不定式作补足语

I saw him play in the street just now .

能跟不带to 的不定式作补足语