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

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英语语法
He acted as if he _____A___ everything in the world.
A.knew B.knows C.has known D.won't know
as if的虚拟句子不是要有had+Ved吗?这里为什么没有had呢?
英语语法He acted as if he _____A___ everything in the world.A.kn
He acted as if he _____A___ everything in the world.
A.knew B.knows C.has known D.won't know
as if的虚拟句子不是要有had+Ved吗?这里为什么没有had呢?
答:你的这个观点是错误的.as if 从句,如果表示虚拟语气的话,是用相应的过去时态,不只是had +pp这一种,还有一般过去时,过去进行时,过去将来时等等.一句话,就是用比相应的真实情况往前去(过去)的一种时态来表示.
比如,他不是一个专家(he is not an expert.),可他讲话的样子好象是个专家似的:He speaks as if he was an expert.(将现在时变成过去时,就可以表达虚拟语气了).
再比如,他没有去过美国.(he hasn't been to the USA.) 可他说话的样子,好象他去过美国似的:He speaks as if he had been to the USA.( 将现在完成时向前进一步,变成过去完成时 had +pP)
原题句中的实情是:He doesn't know everything in the world.
当然,如果此人一惯有这种作风,主句时态不妨用一般现在时:He often acts as if he knew everything in the world.这样楼的疑问是不是就没有了呢?