you know how there was something i wanted.

题目

you know how there was something i wanted.
you know how there was something i wanted to talk to you about
－－－取自老友记5季5集
请问：其中的how 我不理解这个语法,how 在这个句子起什么作用

答案

you know how是一个习惯用法.意思是.“嗨,你知道吗?”用于提醒对方我要和你说写什么.认真听好.怎句话是说“你知道吗,我有些话想跟你说耶”或“额.你知道吗.我想跟你谈谈啦.”
就相当于“you know what,i have something to talk with u”