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几道关于语态的英语题-Did you telephone the doctor's office?-Yes.He_bac

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几道关于语态的英语题
-Did you telephone the doctor's office?
-Yes.He_back before next Sunday
is expected
Thousands of people took park in the work when the old temple__
was being rebuilt
You should have asked for directions.The policemen in our city are very helpful
Yes.Two hours__in finding this place
d.was wasted
would you have come to his help,had you been free
yes.but i_engaged
a.was
谁可以解释下为什么选这个答案,现在暂时没分,
被动语态(一般现在时)
主动语态变被动语态时,主动语态句中的宾语变成被动语态句中的主语,主动语态句中的主语成为被动语态句中的动作的发出者.
被动语态的口诀
一般现、过用be +过去分词,be有人称、时、数变.
完成时态have(has) done,被动将been加中间.
一般将来shall (will) do,被动变do为be done.
将来进行无被动,shall (will) be doing,
现在完成进行同,have (has) been doing.
现、过进行be doing,被动be加being done.
情、助、有、是妥安排,一律随新主语变.
否定助后加not,疑问一助置主前.
主语恰是疑问词,直陈语序主在前.
一般情助加be done,双宾多将间宾变.
复合宾语宾变主,宾补、主补相应变.