They must have been here the day before yesterday,__________?
They must have been here the day before yesterday,__________?
A.mustn't they B.didn't they
C.mustn't have they D.had they
為什么有yesterday 就要用didn't they?
A.為什么不可以呢?
A.mustn't they B.didn't they
C.mustn't have they D.had they
為什么有yesterday 就要用didn't they?
A.為什么不可以呢?
英語人氣：531 ℃時間：2019-10-24 02:15:56
優(yōu)質解答
這里的must表示推測不是一般情態(tài)動詞的用法,所以要看主句的時態(tài),因為是一般過去時（yesterday）,所以要用助動詞didn't
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