一、用於引導主語從句
在許多情況下，當語義上需要用一個較複雜的that從句用主語時，若直接將其置於句首位置，則會顯得“頭輕腳重”。這時，我們通常採用的辦法便是使用形式主語it來改變句子結構。如：
That he had no girl friends worried his parents a lot.= It worried his parents a lot that he had no girl friends. 他沒有女朋友，這件事使他父母非常不安。
That he has fully recovered makes me feel good.=It makes me feel good that he has fully recovered. 他已痊癒，真令我高興。
That he had not said anything surprised everybody.=It surprised everybody that he had not said anything. 他一言不發，這使大家很吃驚。
在比較正式的文體中，有時也可藉助the fact這一輔助手段，按以下方式改寫句子：
The fact that he had no girl friends worried his parents a lot.
The fact that he has fully recovered makes me feel good.
The fact that he had not said anything surprised everybody.
二、用於介詞後引導賓語從句
按英語習慣，介詞後面通常不能直接跟一個that從句作賓語，遇此情況，人們通常在that從句前使用the fact。這樣一來，就變成了the fact用作介詞的賓語，而其後的that從句則成了the fact的同位語從句。如：
They were worried over the fact that you were sick. 他們為你生病發愁。
I didn't go out because of the fact that it was raining. 因為在下雨，所以我沒出去。
Were it not for the fact that you helped me, I would be homeless. 若非你的幫助，我仍會無家可歸。
He must face up to the fact that he is no longer young. 他必須勇於正視自己不再年輕這一事實。
It's time you woke up to the fact that you're not very popular. 你早就該明白你不怎麼受歡迎了。
The judge paid a lot of attention to the fact that the child was unhappy at home. 法官非常注意這一情況，即孩子在家裡並不快樂。
He said the parents were responsible for the fact that the child had run away. 他說孩子父母應對孩子逃跑一事負責。
註：英語中只有極個別介詞(如except等)可直接跟that從句。如：
The two books are the same except that this one has an answer key at the back. 除了這本書後面有問題答案以外, 這兩本書完全一樣。
三、用於動詞後引導賓語從句
英語中有的動詞雖為及物動詞，可接名詞或代詞作賓語，但通常不接that從句作賓語。若語義上需要接一個that從句，則可藉助the fact結構。如：
I dislike the fact that he smokes. 我厭惡他吸煙。
No one can deny the fact that fire burns. 無人能否認火能燃燒的事實。
You can't escape the fact that she has got married three times. 她結過三次婚，這個事實你是不能逃避的。
We must face the fact that we might lose our deposit. 我們必須正視我們可能失去存款這一事實。
I admired the fact that he would talk to students outside the classroom or talk with them on the telephone. 我羨慕他經常在課外與學生聊天或通過電話與學生聊天。
在許多情況下，當語義上需要用一個較複雜的that從句用主語時，若直接將其置於句首位置，則會顯得“頭輕腳重”。這時，我們通常採用的辦法便是使用形式主語it來改變句子結構。如：
That he had no girl friends worried his parents a lot.= It worried his parents a lot that he had no girl friends. 他沒有女朋友，這件事使他父母非常不安。
That he has fully recovered makes me feel good.=It makes me feel good that he has fully recovered. 他已痊癒，真令我高興。
That he had not said anything surprised everybody.=It surprised everybody that he had not said anything. 他一言不發，這使大家很吃驚。
在比較正式的文體中，有時也可藉助the fact這一輔助手段，按以下方式改寫句子：
The fact that he had no girl friends worried his parents a lot.
The fact that he has fully recovered makes me feel good.
The fact that he had not said anything surprised everybody.
二、用於介詞後引導賓語從句
按英語習慣，介詞後面通常不能直接跟一個that從句作賓語，遇此情況，人們通常在that從句前使用the fact。這樣一來，就變成了the fact用作介詞的賓語，而其後的that從句則成了the fact的同位語從句。如：
They were worried over the fact that you were sick. 他們為你生病發愁。
I didn't go out because of the fact that it was raining. 因為在下雨，所以我沒出去。
Were it not for the fact that you helped me, I would be homeless. 若非你的幫助，我仍會無家可歸。
He must face up to the fact that he is no longer young. 他必須勇於正視自己不再年輕這一事實。
It's time you woke up to the fact that you're not very popular. 你早就該明白你不怎麼受歡迎了。
The judge paid a lot of attention to the fact that the child was unhappy at home. 法官非常注意這一情況，即孩子在家裡並不快樂。
He said the parents were responsible for the fact that the child had run away. 他說孩子父母應對孩子逃跑一事負責。
註：英語中只有極個別介詞(如except等)可直接跟that從句。如：
The two books are the same except that this one has an answer key at the back. 除了這本書後面有問題答案以外, 這兩本書完全一樣。
三、用於動詞後引導賓語從句
英語中有的動詞雖為及物動詞，可接名詞或代詞作賓語，但通常不接that從句作賓語。若語義上需要接一個that從句，則可藉助the fact結構。如：
I dislike the fact that he smokes. 我厭惡他吸煙。
No one can deny the fact that fire burns. 無人能否認火能燃燒的事實。
You can't escape the fact that she has got married three times. 她結過三次婚，這個事實你是不能逃避的。
We must face the fact that we might lose our deposit. 我們必須正視我們可能失去存款這一事實。
I admired the fact that he would talk to students outside the classroom or talk with them on the telephone. 我羨慕他經常在課外與學生聊天或通過電話與學生聊天。
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