标出During that time,the only ture friend was her diary.的主谓宾,以及写出该句子涉及的语法知识.
问题描述：
标出During that time,the only ture friend was her diary.的主谓宾,以及写出该句子涉及的语法知识.
答
During that time,介词短语做时间状语
the only ture friend主语
was her diary系表结构做谓语