1.i have been there before.2.i had been there before.句1的用法正确么我之前_英语解答

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

人气：335 ℃　时间：2019-10-25 20:12:49

解答

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呢虚拟语气中凡是与过去事实相反的都是had done没有have done 的