例句：The boy believes that he will travel through space to other planets.

　　注意事项：当主句谓语动词是 think, believe, suppose, expect 等词，而宾语从句的意思是否定时，常把否定转移至主句表示。

　　例句：I don’t think it is right for him to treat you like that.

　　在以下情况中that不能省略

　　1.当句中的动词后接多于两个由that引导的宾语从句时，第一个that可省，但后面的that不可省。

　　例句：He said (that) you were too young to understand the matter and that he was asked not to tell you.

　　2.当主句的谓语动词与that宾语从句之间有插入语时，that一般不可省。

　　例句：Just then I noticed, for the first time, that our master was wearing his fine GREen coat and his black silk cap.

　　3.当that从句是双宾语中的直接宾语时，that不可省。

　　例句：I can’t tell him that his mother died.

　　注意事项：许多带复合宾语的句子，that引导的宾语从句经常移到句子后部，而用it作形式宾语。

　　例句：I find it necessary that we should do the homework on time.