my mother bought a microwave oven yesterday 改为被动语态

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my mother bought a microwave oven yesterday 改为被动语态

my mother bought a microwave oven yesterday 改为被动语态
my mother bought a microwave oven yesterday 改为被动语态

my mother bought a microwave oven yesterday 改为被动语态
A microwave oven was bought by my mother yesterday.

a microwave oven was bought by my mother yesterday

A microwave was bought by my mother yesterday.
被动语态的结构是系动词的各种时态加动词的过去分词

A present was bought to my mother by me yesterday . 把……带给某人 bring sth to sb A present was bought for my mother yesteday。