问题标题:
-heisn'tagoodswimmer,ishe?-______.a.yes,heisn'tb.no,heisc.no,butheusedtobed.yes,butheusedtobe为什么是c不是d?
问题描述:

-heisn'tagoodswimmer,ishe?

-______.

a.yes,heisn'tb.no,heisc.no,butheusedtobed.yes,butheusedtobe

为什么是c不是d?

齐清文回答:
  AB的前后肯定/否定形式不一致,排除;楼主要明白这种问句的Yes/No的含义,此回答无视原句的肯定否定,直接视原句为肯定句即可.即无论原句是Heisn'tagoodswimmer,ishe?还是Heisagoodswimmer,isn'the?,只要答...
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