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选修7《Learning about Language》最新教案优质课下载
2. 构成：be + 过去分词 (be有时可用become 或get代替), be随着主语的人称、数、时态和语气的不同而变化。
3. 被动语态的各种时态形式有：
一般时态：be + 过去分词
现在过去将来过去将来is/ am/ are donewas/ were donewill/ shall be donewould/ should be doneEnglish is spoken in many countries.
Romeo and Juliet was written by Shakespeare.
Many believe that one day the earth will be destroyed if people do not learn to live in peace.
进行时态：be + being + 过去分词
现在过去将来过去将来is/ am/ are
being donewas/ were
being donewill/ shall be
being donewould/ should be being doneHis plan is being carried out successfully.
The new curtains were being hung when the visitors showed up.
The car will be being cleaned by my brother.
完成时态：have + been + 过去分词
现在过去将来过去将来have/ has been donehad been donewill/ shall have been donewould/ should have been doneI’ve been robbed.
The outcome of the election was announced before all of the votes had been counted.
Everything will have been done by the end of this month.
二. 用法
1. 强调动作的承受者：
Frank was hit by a car.
A new idea has been suggested.
2. 说话者不知道动作的执行者，或者认为没有必要指出：
This bridge was built in 1700.
The house is being repaired.
3. 说话者希望所说的内容显得更加客观，避免就一些自己不太肯定的事表态：