grammar: 动词不定式
一．不定式的五种基本形式
|
|
主动 |
被动 |
|
一般式 |
to do |
to be done |
|
完成式 |
to have done |
to have been done |
|
进行式 |
to be doing |
|
不定式的否定形式：not to do/ not to have done / not to be doing/ not to be done/ not to have been done
不定式的进行式、完成式和被动式
①不定式的进行式由to be + v-ing构成，用来表示谓语动词动作发生时，不定式的动作正在进行。
eg. some students pretended ____________ (read) english when the teacher came in.
②不定式完成式由to have + v-ed构成，用来表示动作发生在谓语动作之前。
eg. --- is bob still performing?
--- i’m afraid not. he is said __________ (leave) the stage already as he has become an official.
资源难易程度:★★★★★★★★★★★★★★★
高考资源网版权所有 ©2005-2010
未经许可，盗用或转载本站资料者，本站将追究其法律责任！
