由that 引导的宾语从句

许多动词可以跟由that引导的宾语从句，that 有时可以省略。
* He says (that) he is a Young Pioneer．他说他是个少先队员。
* We know that it is an interesting story．我们知道它是一个有趣的故事。
* I hope (that) he will be fine soon．我希望他很快好起来。