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问题: 请您帮帮me!

I don't know they can swim,____?

A.do I B.don't I C.can they D.can't they

解答:

C.can they

陈述部分主句为第一人称,谓语是think, believe, expect, know,suppose, imagine等引导的宾语从句,疑问部分与宾语从句相对应构成反意疑问句,并应注意否定转移。例如:

   I don't think he is bright, is he? 我认为他并不聪明,是吗?

   We believe she can do it better, can't she? 我们相信她能做得更好,她能吗?