主句是主系表結(jié)構(gòu).主語：The best kind of friend 系動詞：is 表語：the one
you到句末是定語從句.
定語從句的主語是you 定語從句中有三個并列謂語：could sit,say,walk
句中沒有形式賓語那feeling like it was the best conversation you've ever had這句算什么成份feeling like it was the best conversation you've ever had是現(xiàn)在分詞短語做方式狀語，修飾walk away,其中it was the best conversation you've ever had是省略that的賓語從句。僅供參考