问英语反义疑问句英语高手来He must be Peter Lee,

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He must be Peter Lee,____isn't he _____?
He must have seen the movie,____hasn't he______?
He must have seen the movie yesterday,__didn't he_____?
must表示“肯定”的意思时,它的反义问句尾句不能再用情态动词,而是根据must后的动词时态来决定.如果有过去时间状语,就是一般过去时.
It is unfair,___isn't it_____?(否定前缀不是否定词,所以还是用否定）
（类似：unhappy,unable,impossible等）
======以下答案可供参考======
供参考答案1:
He must be Peter Lee,___isn't he______?因为主句中出现be动词，从句意来看，应该对be进行反义改变。
He must have seen the movie,__hasn't he________?同上。
He must have seen the movie yesterday,__hasn’t he_____?同上。
It is unfair,__isn't it______?同上。
供参考答案2:
musn't he
musn't he
musn't he
isn't it
原句为肯定句，末尾是：谓语（否定）+主语（代词）
原句为否定句，末尾是：谓语（肯定）+主语（代词）
供参考答案3:
isn`t he
hasn`t he
didn`t he
isn`t it