英语语法：He acted as if he ________ everything in the world.A.kn

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英语语法：He acted as if he ________ everything in the world.A.knew B.had known
选哪个,为什么?觉得是B 因为是他以为自己知道一切,然后才会这样的行动,所以知道是在行动之前.

选B.
这是英语虚拟语气的用法,与现在事实相反,用过去式.假如是与过去事实相反,就用过去完成式.因为acted决定过去那个时候,他似乎都懂,所以选B.He acted as if he knew everything in the world.
再问：不明。
再答：比如：你看上去似乎理解他（实际上不理解）。英语表达：It seems as if you understood（与现在事实相反） him。昨天他的表现仿佛他作得很完美（实际上不完美）。He acted as if /as though he had done（与过去事实相反）that perfectly。
再问：对哦意见和你一样哦但是答案给了个A哦
再答：给A 不对。acted是过去，是那个时候似乎……。如果是acts就选A。
再问：解析貌似说知道一切是一种状态所以B不对？如果是知道了某件事，我觉得是B，但是知道一切我就不理解了。
再答：世界上没有一个人知道一切的。 No one in the world knows everthing！

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