我想要坐在这儿。
I want to sit here.
动词不定义做主语。
To sit here is tired.
动词不定式表示将要发生的动作。
Remember to do homework after school.
动词不定式的被动语态。
I want to be known by you.
I want to know you.
I want you to know me.
动词不定式做主语。
To be known by you is very important.
I want to send you to Shanghai.
To be sent to Shanghai saves me a lot of money.
他被送去上海这事儿还没人知道呢。
To have sent him to Shanghai is unknown.
动词不定式做状语。
I'm glad to see him.
我很高兴正在和你哥哥谈话。
I'm glad to be talking with him.
我见过你哥哥了，你给我打电话。
Have you seen my brother?
Yes, I have.
I'm glad to have seen your brother.
即将被你哥哥见到。
I'm glad to be seen by your brother.
我很高兴已经被你哥哥看到了。
I'm glad to have been seen by your brother.
我很不高兴被他审查。
I'm sad to be being checked by him.
正在被审查使我很沮丧。
To be being checked makes me sad.
I study English to go aboard.
I study English to get high salary.
I am reading the book.
The book is being read by me.
动词只能做谓语，不能做宾补。不定式做宾补。
I found him to go.
I found him to have gone.
I found him to be on the way.
I found him to be going.错误，非延续性动词，表将来。
I found him to be taken away.
I found him to have been taken away.
主语
To see him is early.
宾语
I don't like to see him.
宾补
I found him to see my brother.
定语
已经当上班长的女孩快来了。
The girl to have been a monitor is coming.
定语
I have a book to read.
I have a film to see.
I have a friend to meet.
被动
The book to be read is on the table.
The book to read is on the table.主动，因为逻辑主语省略了。
I have a lot of work to do.
The work to do is very much.省略主语。
The work to be done is very much. 被动语态
正在和老师谈话的那个女孩是我的女儿。
The girl to be talking with the teacher is my daughter.
做表语。
To see is to believe.
What she should do is to have finished her homework.
What she should do is to go there.
To have been here is OK.
To have done it is not awful.
What she can do is to be looked after.
What she can do is to have been looked after.
To have been looked after makes me happy.
To be seen by him makes me afraid.
How to do it is a question.
I don't know when to go there.
I don't know whom to go with.
I don't know what to listen to.