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外研2003课标版《Grammar》公开课PPT课件优质课下载
语态(voice)是个语法范畴，它是一种动词形式，表示动词的主语与该动词所表示的动作之间的主动和被动关系。当主语是动作的执行者时，动词用主动语态（Active Voice）；如果主语是动作的承受者，动词便用被动语态（Passive Voice）。
一.被动语态的定义：
二.被动语态的一般结构：
即：be+ done (+ by)
“be+及物动词的过去分词”
We cleaned the classroom yesterday. 昨天我们打扫了教室。
The classroom was cleaned by us yesterday. 昨天教室被我们打扫了。
一般现在时： am / is / are done
一般过去时： was / were done
现在进行时： am / is / are being done
过去进行时： was / were being done
现在完成时： have / has been done
过去完成时： had been done
一般将来时： shall / will be done ; be going to be done
当句中含有情态动词时，句子结构为 can / must / have to…be done
各种时态的被动语态：
Task1.下列句子均有错误，请改正。
1. The building which are being built now is very high .
2. The film is so interesting that it will watched again and again.
3. She promised this baby will be take good care of.
will后加be
take→taken
4. All his homework has finished.
5. The flowers must be water(by us) every day.
water→watered