1、宾语从句前有插入语。
如:We hope, on the contrary, that he will stay at home with us. 恰恰相反,我们希望他和我们呆在家里。
2、有间接宾语时。
如:He told me that he was leaving for Japan. 他告诉我他要去日本。
3、that在与之并列的另一个宾语从句之后。
如:He said (that) the book was very interesting and that(不省略) all the children like to read it.他说那本书很有趣,所有小孩都喜欢读。
4、在“it(形式宾语)+补语”之后时。
如:I think it necessary that he should stay here. 我们认为他有必要留在这里。
5、that从句单独回答问题时。
如:—What did he hear? 他听说了什么事?
—That Kate had passed the exam. (他听说)凯特考试及格了。
6、在except等介词后。
如:He has no special fault except that he smokes too much.他除了抽烟太多之外,没有什么特别的毛病。
7、位于句首时。
如:That our team will win, I believe. 我相信我们队会赢。
8、在较为正式或不常用的动词(如reply, object)后。
如:He replied that he disagreed. 他回答说他不同意。