must=have to 必须；不得不
They must clean their classroom every day
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相关问题
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改被动语态They clean their classroom every day.
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we must clean the classroom every day 同义句
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They take (turn) to clean the classroom every day.
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We must clean our classroom every day.怎样改为被动语态
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句型转换 1. We must clean the classroom every day.(同义句转换)
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we must clean our classroom every day .（改为一般疑问） we have rule
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Our classroom need______!（clean）every day
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they have to （clean the classroom） every day对括号的部分提问
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把主动语态改成被动态students must clean their classriom every day
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1.We clean the classroom every day.（用tomorrow代替every day）