1）由從屬連詞that引導的從句叫做名詞性that-從句。That只起連接主句和從句的作用，在從句中不擔任任何成分，本身也沒有詞義。名詞性that-從句在句中能充當主語、賓語、表語、同位語和形容詞賓語。例如：

　　主語：That he is still alive is sheer luck.　 他還活著全靠運氣。

　　賓語：John said that he was leaving for London on Wednesday.　約翰說他星期三要到倫敦去。

　　表語：The fact is that he has not been seen recently. 事實是近來誰也沒有見過他。

　　同位語：The fact that he has not been seen recently disturbs everyone in his office.

　　近來誰也沒有見過他，這一情況令辦公室所有的人不安。

　　形容詞賓語：I am glad that you are satisfied with your job. 你對工作滿意我感到很高興。

　　2）That-從句作主語通常用it作先行詞，而將that-從句置于句末。例如：

　　It is quite clear that the whole project is doomed to failure.　很清楚，整個計劃注定要失敗。

　　Its a pity that you should have to leave.　你非走不可真是件憾事。

　　用it作形式主語的that-從句有以下四種不同的搭配關系：

　　a. It + be +形容詞+ that-從句

　　It is necessary that　　　 有必要

　　It is important that　　　 重要的是

　　It is obvious that　　　　 很明顯

　　b. It + be + -ed 分詞+ that-從句

　　It is believed that　　　　　人們相信

　　It is known to all that　　　 從所周知

　　It has been decided that　　 已決定

　　c. It + be +名詞+ that-從句

　　It is common knowledge that　 是常識

　　It is a surprise that　　 令人驚奇的是

　　It is a fact that　　　　 事實是

　　d. It +不及物動詞+ that-分句

　　It appears that　　　　　　似乎

　　It happens that　　　　　　碰巧

　　It occurred to me that　　 我突然想起

　　1）由從屬連詞that引導的從句叫做名詞性that-從句。That只起連接主句和從句的作用，在從句中不擔任任何成分，本身也沒有詞義。名詞性that-從句在句中能充當主語、賓語、表語、同位語和形容詞賓語。例如：

　　主語：That he is still alive is sheer luck.　 他還活著全靠運氣。

　　賓語：John said that he was leaving for London on Wednesday.　約翰說他星期三要到倫敦去。

　　表語：The fact is that he has not been seen recently. 事實是近來誰也沒有見過他。

　　同位語：The fact that he has not been seen recently disturbs everyone in his office.

　　近來誰也沒有見過他，這一情況令辦公室所有的人不安。

　　形容詞賓語：I am glad that you are satisfied with your job. 你對工作滿意我感到很高興。

　　2）That-從句作主語通常用it作先行詞，而將that-從句置于句末。例如：

　　It is quite clear that the whole project is doomed to failure.　很清楚，整個計劃注定要失敗。

　　Its a pity that you should have to leave.　你非走不可真是件憾事。

　　用it作形式主語的that-從句有以下四種不同的搭配關系：

　　a. It + be +形容詞+ that-從句

　　It is necessary that　　　 有必要

　　It is important that　　　 重要的是

　　It is obvious that　　　　 很明顯

　　b. It + be + -ed 分詞+ that-從句

　　It is believed that　　　　　人們相信

　　It is known to all that　　　 從所周知

　　It has been decided that　　 已決定

　　c. It + be +名詞+ that-從句

　　It is common knowledge that　 是常識

　　It is a surprise that　　 令人驚奇的是

　　It is a fact that　　　　 事實是

　　d. It +不及物動詞+ that-分句

　　It appears that　　　　　　似乎

　　It happens that　　　　　　碰巧

　　It occurred to me that　　 我突然想起