He must have learn English for three years,___?A.hasn't he B

1个回答

  • 1.must 表示推测时,其后的反意疑问句要根据must后的谓语动词一致.

    你查到的几个句子有两个对,中间那个不对.

    You must have studied English for three years, haven't you? / didn't you?

    这个句子只能用haven't , 不可以用didn't.

    2.在前面的陈述句中有具体的过去的时间状语时才用didn't .所以第三个句子是正确的.

    He must have finished it yesterday, didn't he?

    那么你的单选题:He must have learn English for three years,___?

    A.hasn't he B.haven't he C.mustn't he D.didn't he

    正确答案就是A.

    如果有疑问就hi我.祝你学习愉快!