you ( ) have seen Jane in her office last Friday,she has bee

you ( ) have seen Jane in her office last Friday,she has been out of town for 2 weeks
括号里填couldn't mustn't 不行吗

zgrzqq 1年前已收到2个回答举报

phyjay 春芽

共回答了14个问题采纳率：92.9% 举报

couldn't 表示对过去事情的猜测.
mustn't表示禁止,不可能,用语对现在的猜测.如your father must be over 40!

1年前

成佐幼苗

共回答了75个问题举报

couldn't 表示对过去事情的猜测。
mustn't表示禁止，不可能，用语对现在的猜测。

1年前

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