Question

they don't believe the boy is lying,do they?

这个句子的反问句是do they还是isn't he

Answer 1

they don't believe the boy is lying,do they?

Answer 2

答案：do they
解释：
1、反意疑问句的陈述部分为I(We) don’t think(believe, suppose, consider)+ that从句时，从句为否定意义，问句部分的动词和主语仍与that从句保持一致且用肯定式。如：
①I don’t think that you can do it, can you? (不用do I?)
②We don’t believe that the news is true, is it? (不用do we?)
2、反意疑问句的陈述部分为非第一人称主语+ think(believe, suppose, consider) + that从句时，问句部分的动词和主语与陈述部分的主句动词和主语保持一致。如：
①They all think that English is very important, don’t they? (不用isn’t it?)
②He didn’t think that the news was true, did he? (不用wasn’t/ was it?)

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