he left without having breakfast怎样变成反意疑问句?

he left without having breakfast怎样变成反意疑问句?

题目
he left without having breakfast怎样变成反意疑问句?
答案
didn't he?因为主句是he left, without having breakfast是介词短语做状语, 反义疑问句应看主句,因为主句是肯定,所以反义疑问句用否定,didn't he? He has never been to Beijing, has he? 因为主句当中有否定意义的...
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