题目内容
2．Look!Some students are cleaning the classroom．（改为被动语态）Look!The classroomis being cleaned by some students．
分析 看，教室在被一些学生打扫．
解答 Some students are cleaning the classroom．变成被动语态时，时态不变，主语变成宾语，宾语变成主语，即：The classroom is being cleaned by some students．所以这里填is being．
点评 此题考查被动语态，注意主宾关系及被动语态的时态，此题为现在进行时．
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