it is the first time和it was the first time后面接的时态各是什么?

it is the first time和it was the first time后面接的时态各是什么? It is（was） the first time后的从句只能用完成时态吗? It is the first time I have seen hern 和 It was the first tim It was for the first time that后面从句用什么时态 it was the first time 后面为什么要用过去完成时 it is the first time应该加什么时态? There is a time when 和it is the first time后的句子是用什么时态? it is/was the first time +that+clause中从句用什么时态? it was the first time that I had seen the sea和it is the firs It was the first time that I ----- ------ ----- ----- ------ it is/was the first time that有什么用法 用for.the.first.time和at.first 和it.was.the.first.time和the.firs