It was nice talking to you和It is nice talking to you用哪个?

It was nice talking to you和It is nice talking to you用哪个? It was nice talking to you keep quite It was nice talking to you.这句话是什么时态? nice talking to you, Nice talking to you. 为什么是It's nice talking to you.而不是It's nice to talk to you. It's been nice talking to you.为什么用is不用has? It's been nice talking to you的意思 nice talking to you.是什么意思 it is been very nice talking to you请问为什么有个been nice talking with you 和 nice talking to you有什么区别 Nice ______ to you talking to talk