这两句话哪句是对的?1.These three rooms ought to be kept clean by you.
这两句话哪句是对的?
1.These three rooms ought to be kept clean by you.
2.These three rooms ought to have been kept clean by you.
为什么?
或者有更好的说法?
1.These three rooms ought to be kept clean by you.
2.These three rooms ought to have been kept clean by you.
为什么?
或者有更好的说法?
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你能帮帮他们吗