既然有be sure of sth,为什么宾语从句要用be sure that而不是be sure of that呢?

既然有be sure of sth,为什么宾语从句要用be sure that而不是be sure of that呢? be sure+从句/be sure to do sth /be sure of sth/doing sth 有什么区别吗? be sure of doing sth和make sure of doing sth有区别吗?请详解make sure和be sure的用法, be sure to do sth be sure of sth be sure+that从句 辨析 be sure of 与be sure to do sth be sure of sth.与 be sure about 区别? be sure that等于be sure of sth. be sure of /about doing sth和be sorry for about 有没有这些用法? make sure to do sth、be sure of sth、be sure that 、be certain of/about的区别 be sure to do sth和be sure of doing sth的区别 be sure of可否换为make sure of? Be sure of与Be sure to有什么区别 be sure to do sth. 英语高手请进,Quite a few people used to believe that disaster ___if a mirror was broken.A.was sure of striking B.was sure of having struck D.was sure to strike可书上两句型都有：be sure /certain of sth be sure /certain to do sth还有 be sure to do sth...有这样的?sure还能怎样用 sure的用法be sure of doing和 be sure to do有什么区别呀? 辩析be sure to do sth be sure to do sth be sure that+从句 she is sure to succeed ,many people feel sure ______ it A.to B.for C.in D.of 选择 D 因为 sb is sure to do sth 表示 某人有信心做成某事be sure to do sth 的形式 、后面的那个空是 sb is sure of sth .be sure of doing sth 或 be su