that名詞性從句

　　1.引導(dǎo)賓語從句。及物動詞后的引導(dǎo)詞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.引導(dǎo)主語從句。通常采用it作形式主語的句型。

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

　�。↖t is known to everyone that the earth goes around the sun.）

　　3.引導(dǎo)表語從句。

　　The trouble is that we are short of money.

　　4.引導(dǎo)同位語從句。

　　引導(dǎo)同位語從句的that和引導(dǎo)定語從句的that是不同的。前者只起語法作用，在從句中不作任何成分；而后者在定語從句中作主語、賓語或表語。舉例說明：

　　The news that he resigned from office surprised us.

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