是的 ,都可以这样用.如it's said to rain soon.据说 很快要下雨.iit's reported the presedent will visit China.据报道.it's believed the story is true. 众所周知.除了接动词不定式外后面都可以跟宾语从句....举个能接不定式的例子it's said to rain soon。据说 很快要下雨。iit's reported to bethe right person..据报道。。。it's believed to be true.应该有上下文，理解起来就容易了。