4. 作宾语补足语

The teacher told his students to pay more attention to their pronunciation.

I would like the problem to be discussed at the next meeting.

A. ask, tell, order, command, beg, get, request, require, invite, force, permit, cause, forbid, allow, wish, want, expect, encourage, advise, persuade, warn, would like等动词可以接带to的不定式作宾补。

5. 作目的状语， to可用in order to或so as to代替（so as to 不能置于句首）。

1. She got off the train in Beijing to see a friend.

2. Some scientists went to Germany to attend a medical conference.

3. They started very early in order not to miss the train.

不定式的复合结构

1. 疑问词+不定式 的复合结构

1) When to start has not been decided yet.

2) The problem is how to persuade him to change his mind.

3) We must learn what to do in face of difficulties.

4)I wonder if you could tell me how to get to the station.

2. 带有逻辑主语的结构

1. It's kind of you to lend me such a beautiful necklace.

2. It's important for us to master a foreign language.

3. The first thing for us to do is to clean the room.

is + adj. + of sb. to do

此结构中的形容词说明逻辑主语的特征，可作逻辑主语的表语。

It is + adj. + for sb. to do

此结构中的形容词说明句中行为动词的特征。

不定式的时态和语态

不定式 主动式 被动式 一般式 to do to be done 完成式 to have done to have been done 进行式 to be doing 　　　　　　/ 完成进行式 to have been doing / Practice：1. He told us whether _____ a picnic was still under discussion.

A. to have B. having C. have D. had

　　　　2. The play ____ next month aims mainly to reflect the local culture.

　　　　　A. produced B. being produced

　　　　　C. to be produced D. having been produced

　　　　3. ___, you need to give all you have and try your best.

　　　　　A. Being a winner B. To be a winner

C. Be a winner D. Having been a winner