29.Edward,you play so well.But I( )you played the piano.A.didn’t know B.hadn’t knownC.don’t know D.haven’t known但是为什么不选B?

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29.Edward,you play so well.But I( )you played the piano.
A.didn’t know B.hadn’t known
C.don’t know D.haven’t known
但是为什么不选B?

B是过去完成时,它表示的是过去的过去,而显然我不知道发生在you played the piano之后,是played the piano 在先,我不知道在后而且他们都发生在过去.所以选A

因为前半句是一般时,所以后半句要倒退一个时态也就是过去式。
如果想选B,前半句应该调整为:“played so well”才行哦

因为现在已经在看过爱德华弹钢琴后知道了,在此之前不知道。这是一个很常用的表达方式。

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