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1.i have been there before.2.i had been there before.

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1.i have been there before.2.i had been there before.
句1的用法正确么 我之前去过那里 可是现在并不在那里 不是应该过去完成时么 因为是在过去的时间去过 那为什么还会有have been there before 什么区别
1.i have been there before.2.i had been there before.
现在完成时立足现在 过去完成时立足过去
I had been there before i came to China
再问： 你是说过去完成时不能单独存在么？ 那如果是虚拟语气 If only i had been there. 为什么不是have been呢
再答： 虚拟语气中凡是与过去事实相反的 都是 had done 没有have done 的
I had been there before Because I never have been there before. they have been there before.so have i they have been there b I never there before.A.have;been to B.have;been C.have;gone I never been there before=I haven't been there before? I've been there before 还是I've been to there before? I have never been there before.这个句子中的before能否改成ago We had never been there before have been I have been a doctor before.I had been a doctor be I have been there 一首歌 HELP I ...again i have been there anytimes before hurt m he must have been there before-----