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

答案：do they1、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...