“Why do you drink so much coffee?”
“Well, ____ it doesn’t keep me awake nights, I see no harm in it.”
A. although B. as long as C. as far as D. for(TOEFL)
答案规定只能选B，而不能选C。这是为什么呢？
as long as 用作连词时,其主要意思是“只要”,而 as far as 是指“在……范围内”,引导限制状语从句,常常用于下列结构:as far as I know(据我所知),as far as I can see(据我看),as far as I'm concerned(依我看,就我而言)。
请对比下面的例句：
- I'm happy as long as you are happy. (Greene)
只要你幸福，我就感到幸福了。
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As long as you can keep away from them you're safe. (Mansfield) 只要你脱离他们,你就安全了。
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There's only one thing to be done, as far as I can see. (Dreiser) 据我看，只有一件事需要做。
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He looked disturbed, but as far as Harry was concerned, that question could wait. (J. K. Rowling, Harry Potter and the Deathly Hallows) 他看起来很不安,但是,依他看,这个问题还是可以放一放。(《哈利·波特与死亡圣徒》)
as far as 还有其他用法：
A.“一直到……”，既可表示实际距离(行程长度)，也可用于比喻性的距离：
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I walked as far as the church. (Hemingway) 我一直走到教堂。
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Yes, we walked as far as the river. (LDAE) 是的,我们一直走到河边。
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Yesterday we went as far as the third line on page 20. 昨天我们已看到第20页第3行。B. 像……那么远：
We didn't go as far as the others (did). 我们没有像其余的人那样走那么远。