那么be confident of 与be confident about 有什么区别呢?

那么be confident of 与be confident about 有什么区别呢? be confident of和be confident in有什么区别 "be confident of","be confident about"的区别? be confident to 和be confident of用法有什么区别? be confident of 和be confident in 到底有什么区别、、、能讲清楚吗 be confident in和be confident of的区别 confident of ‘be confidence in区别 have confidence in,be confident of有什么区别,后面都可加sth.,sb. 英语高手请进be confident of和be confident about 如果没有是可以通用吗? be confident of doing sth,那么be confident of to do sth是不是也可以? be confident of同义短语 be confident in/of/with