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i heard that you really had a wonderful life at john's birth

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i heard that you really had a wonderful life at john's birthday party ,hadn't you
请问句中的 hadn‘t 为什么错了?
这里从句就是一个简单的过去式,所以否定疑问句用didn't you就可以了,否定疑问句的变化规则跟一般疑问句是一样的道理. hadn't you是用于过去完成时,如果原句是 I heard that you had finished your homework, 就要用hadn't you了~