表語從句的用法

表語從句

在復(fù)合句中作表語的從句叫表語從句。引導(dǎo)表語從句的關(guān)聯(lián)詞與引導(dǎo)主語從句的關(guān)聯(lián)詞大致一樣，表語從句位于連系動(dòng)詞后，一般結(jié)構(gòu)是“主語+連系動(dòng)詞+表語從句”?？梢越颖碚Z從句的連系動(dòng)詞有：be, look, remain, seem等。注意：關(guān)聯(lián)詞不能省略，并且從句用陳述語序。例如：

The fact is that we have lost the game. That is why he didn't come to the meeting.

需要注意的，當(dāng)主語是reason時(shí)，表語從句要用that引導(dǎo)而不是because。但是reason 后面的定語從句可以用why 或that引導(dǎo)。例如：The reason why he was late was that he missed the train by one minute this morning

【附加】在名詞性從句中that與what的區(qū)別:

that在名詞性從句中不充當(dāng)句子成分,只起連接作用，沒有意義，不能省略（在賓語從句中能省略）。

如：That they are good at English is known to us all.

The problem is that we don't have enough money.

what在名詞性從句中充當(dāng)句子成分，起連接作用，有意義，不能省略。what可以分解成定語從句中的先行詞 + 關(guān)系代詞+ that。理解為雙重身份。

如：Do what he says. What (=The thing that) he said was true.