英文that引導的名詞子句(Noun clause with that in English)

That所引導的名詞子句當句子的主詞時，視為單數；that所引導的名詞子句當動詞的受詞時，that可以省略

當主詞用	That+子句+動詞	That Tom eats fast is well-known.(Tom吃很快是眾所皆知的)
當受詞用	主詞+動詞(+that)+子句	Teachers think (that) Jack is very smart.(老師認為Jack非常聰明)
當補語用	主詞+be動詞+that+子句	The thing I think is that you are wrong.(我認為你錯了)