has been 和 had been 的用法和差别

has been 和 had been 的用法和差别

题目
has been 和 had been 的用法和差别
如题~我总是分不清而且总用错,可以解释一下怎么用他们吗和他们的差别.
but my teachers said that use had been when there is two statements connected together or their is exact timing..is that correct?thx
答案
have been 和 has been 只是根据前面主语的人称而定.都是一般现在完成时 简单来说如果前面是I,you,we以及复数形式的主语则是have been 第3人称单数如he,she,it,则是用has been 有been的话表示被动语态 had been则是...
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