It`s the first time that he has been to Australia,isn`t it?中,为什么要_英语解答

It`s the first time that he has been to Australia,isn`t it?中,为什么要用isn`t it,而不用hasn`t he?

人气：476 ℃　时间：2020-05-10 23:09:51

解答

it是形式主语,that后面的才是主语,句子是对主句it提问,而不是对从句提问.
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