把主动语态改成被动态students must clean their classriom every day

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把主动语态改成被动态students must clean their classriom every day
把主动语态改成被动态students must clean their classriom every day

把主动语态改成被动态students must clean their classriom every day
The classroom must be cleaned by the students every day

the classroom must be cleaned by the students every day

The classroom must be cleaned by the students every day .
一般的主动变被动的做法是将主动语态的宾语提前 如本句中的their classroom 加情态动词如本题must must后加上be 主动语态的动词要变过去分词如本题的cleaned 后面加by 加主语

The classroom must be cleaned by the students every day.

The classriom should be cleaned (by students) every day.
注意、被动语态时应注意转换情态动词 must表主动 should表客观应该 括号中的为可要可不要的部分。