He hardly spent any time on his subjects.did he No,so he does badly in his lessons 见补充

问题描述:

He hardly spent any time on his subjects.did he No,so he does badly in his lessons 见补充
这句话中的NO是不是表示的是肯定?代表yes?但是为什么要这么说?有什么规则和技巧吗?

表示肯定.
附加疑问句,只要前面陈诉的是事实,就用yes,与事实相反就用No.与后面的问法无关系.