一般现在时的被动语态：

　　承受者+be（is/am/are）+done（过去分词）by+执行者

　　E.g.：Many schools are built（done）every year in the city.

　　note：地点状语，时间状语一般都放在句末；in the city 特指。

　　其中be的使用取决于主语的单复形式。

　　A lot of修饰可数和不可数名词

　　Many修饰可数名词

　　Mach修饰不可数名词

　　主动：They all read（原形）English every day.

　　被动：English read （过去分词）by all of them every day.

　　主动：Mother often scolds me.

　　被动：I am often scolded by mother.

　　一般过去式的被动语态

　　承受者+be（was/were ）+done（过去分词）by+执行者（不明确可省略）。

　　E.g.：主动：He repaired his bike yesterday.

　　被动：His bike was repaired by him yesterday.

　　主动：Children cleaned many streets last Sunday.

　　被动：Many streets were cleaned by children last Sunday.