it is adj that这个我知道有 it is 过去分词 that有这种句式么

题目

it is adj that这个我知道有 it is 过去分词 that有这种句式么
怎么区分是adj还是过去分词这里 区分出的作用是什么

答案

有的,比如it is said据说it is reported that据报道it is believed that 人们认为这几个是被动,过去分词,因为,逻辑主语是省略了by sb而,it is important for sb to do sth的逻辑主语是 for sb,就是人,人自己做事,是...