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【英文常見陷阱句】
一、表語(yǔ)從句
1. 定義：用作表語(yǔ)的從句叫做表語(yǔ)從句。
2. 構(gòu)成：關(guān)聯(lián)詞+簡(jiǎn)單句
3. 引導(dǎo)表語(yǔ)從句的關(guān)聯(lián)詞的種類：
(1) 從屬連詞that。如：
The trouble is that I have lost his address. 麻煩是我把他的地址丟了。
(2) 從屬連詞whether, as, as if。如：
He looked just as he had looked ten years before. 他看起來還與十年前一樣。
The question is whether they will be able to help us. 問題是他們是否能幫我們。
注：從屬連詞if一般不用來引導(dǎo)表語(yǔ)從句，但as if卻可引導(dǎo)表語(yǔ)從句，如：
All this was over twenty years ago, but it's as if it was only yesterday.
這都是20多年前的事了，但宛如昨天一樣。
能跟表語(yǔ)從句的謂語(yǔ)動(dòng)詞一般為系動(dòng)詞be, seem, look等。如：
It looked as if it was going to rain. 看起來天要下雨了。
(3)連接代詞who, whom, whose, what, which, whoever, whatever, whichever
連接副詞 where, when, how, why。
如：The problem is who we can get to replace her. 問題是我們能找到誰去替換她呢。
The question is how he did it. 問題是他是如何做此事的。
That was what she did this morning on reaching the attic. 那就是她今晨上了閣樓干的。
解釋：
1. 連詞because可引導(dǎo)表語(yǔ)從句。如：
I think it is because you are doing too much. 我想這是因?yàn)槟阕龅锰唷?/p>
2. 在一些表示“建議、勸說、命令”的名詞后面的表語(yǔ)從句中，謂語(yǔ)動(dòng)詞用虛擬語(yǔ)氣。should+動(dòng)詞原形表示，should可省略。如：
My suggestion is that we (should) start early tomorrow. 我的建議是我們明天一早就出發(fā)。
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