it was nice talking to you为什么用 talking而不用to talk

It was nice talking to you和It is nice talking to you用哪个? 为什么是It's nice talking to you.而不是It's nice to talk to you. It' no good _____ like that.为什么用talking而不用to talk Nice ______ to you talking to talk It's been nice talking to you.为什么用is不用has? Nice talking to you.中,talk为什么加ing? 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. It was nice talking to you.这句话中有was,为一般过去式,为什么tlak后不加ing/ nice talking to you.是什么意思