My sister Isabel is the funniest person I know. I know 这里是什么成分啊?
问题描述：
My sister Isabel is the funniest person I know. I know 这里是什么成分啊?
答
定语从句,I KNOW 前面省略了that,完整原句为 my sister isabel is the funniest person that i know.that 指代my sister isabel,同时做i know 的宾语.