高一单选一道Edward,you play so well.But I _____ you played the pia

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高一单选一道
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
为什么不选B?不是过去的过去吗》

过去完成时表过去的过去.
要在过去的时态里,再往前推需要过去的时态才需要用到had,
I had seen Castles before I went to England.
我去英国前就看过城堡了.
去英国是过去时态,在这之前就看过城堡,过去的过去.
这里只需要过去时.

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