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译林2003课标版《Grammar and usage(1)： The passive voice；Modal verbs and the passive voice》新课标PPT课件优质课下载
The light ____________ (turn off) by a student.
is turned off
Point out the verb, the subject and the object in the following sentences:
We kept food in the fridge.
We must close the windows and the door.
S
V.
O.
S
V.
O
Food ________ by us in the fridge.
The windows and the door ____________
by us.
was kept
must be closed
主动语态和被动语态结构的转换
结构：主动语态：主语+谓语+宾语
被动语态: 主语+(be+过分)+(by+宾)
注意：主动句改为被动句时，句子时态不变。
We
He
us
him
We kept food in the fridge.