作业帮I thought the kitchen window must ____(be) opened,(用括号词的适当形式填空）
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I thought the kitchen window must ____(be) opened,(用括号词的适当形式填空）
I thought the kitchen window must ____(be) opened,(用括号词的适当形式填空）
I thought the kitchen window must ____(be) opened,(用括号词的适当形式填空）
must have done 结构
表示对过去的肯定推测,橱窗一定被打开过
be 因为must后面都用原型be
be.
I thought the kitchen window must have been opened.
be
have been别人的都错了，我是新加坡的