that后面加什么词性的词语

　　that名词性从句

　　①引导宾语从句。及物动词后的引导词that可省略。

　　I didn't expect (that) he could win the championship.

　　The teacher pointed out that Tom was not working hard enough.

　　②引导主语从句。通常采用it作形式主语的句型。

　　That the earth goes around the sun is known to everyone.

　　（It is known to everyone that the earth goes around the sun.）

　　③引导表语从句。

　　The trouble is that we are short of money.

　　④引导同位语从句。

　　引导同位语从句的that和引导定语从句的that是不同的。前者只起语法作用，在从句中不作任何成分；而后者在定语从句中作主语、宾语或表语。举例说明：

　　The news that he resigned from office surprised us.

　　The idea that he holds is very common nowadays on campus.