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各种时态的被动语态结构：
一般现在时被动语态：主语＋be＋动词过去分词＋by(加宾格);
一般过去时被动语态：主语＋waswere＋动词过去分词;
现在进行时被动语态：主语加amisare加being加动词过去分词;
过去进行时被动语态：主语+waswere+being+动词过去分词
扩展资料
补充：
现在将来时
主语+be going to be+动词过去分词；
过去将来时
主语+was/were going to be +动词过去分词；
现在完成时
主语+have/has + been+动词过去分词；
过去完成时
主语+had +been +动词过去分词；
例句：
He had posted the letter .
A nice song has been sung by him.
He said he would finish the project by the time we reached there.
They will clean the windows tomorrow.
He was making a model plane.
Helen is writing a letter.
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