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《Grammar》公开课PPT课件优质课下载
一般式
to do
to be done
进行式
to be doing
完成式
to have done
to have been done
否定式：not + to do
To teach English is my job.
We plan to pay a visit.
? He seems to know a lot.
? The meeting to be held tomorrow is put off.
? The teacher ordered the work to be done.
To catch the first bus, he got up early.
（1）一般式：所表示的动作与谓语动词动作同时发生或发生在谓语动词动作之后(不定式用主动形式还是被动形式取决于它和所修饰词之间的逻辑关系。)
The boy pretended to be working hard.
He seems to be reading in his room.
(2)进行式：所表示的动作与谓语动词动作同时发生，
（3）完成式：表示的动作发生在谓语动词动作之前
I regretted to have told a lie.
I happened to have seen the film.
He is pleased to have met his friend.
To finish the work in ten minutes is very hard.
To lose your heart means failure.