英语语法I can’t stand him.He always talks as though he _A__ ever

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英语语法
I can’t stand him.He always talks as though he _A__ everything.
A.knew B.knows C.has known D.had known
为什么这里选D不对?
请问这不是虚拟语气吗？

as if /as though 后面的从句可以是虚拟语气也可以不是虚拟语气
要根据意思来判断.
本句as though后面是与现在相反的虚拟语气所以用一般过去时.
如果选D的话是与过去相反的虚拟语气
本句没有牵涉到过去指的是现阶段经常发生的情况.故不能用过去完成时表示与过去相反的虚拟语气.
如果用过去完成时的话
句子应该是 I couldn’t stand him.He always talked as though he had known everything.

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