核心问题
as far as 与 so far as 在用法和意义上是否完全相同?
词典解答
当 as far as 和 so far as 作“在……范围内”“一直到”“到……那么远”解时,它们是可以互换的,例如:
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So far as I know, he will be away for three months. (ALD) 据我所知,他将离开这里三个月。
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Man: Will the field trip be on Friday as originally scheduled?
Woman: As far as I know. (TOEFL)
男:郊游还是像开始计划的那样星期五去吗?
女:据我所知,是这样。
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We did not go so(as) far as the bridge. (Palmer)[as(so) far as 表示旅程的长度] 我们没有走到桥那么远。
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They drove as far as Edinburgh. (CGEL) 他们驱车远达爱丁堡。
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We didn't go so far as the others(did). (ALD) 我们没有像其余的人那样走那么远。
这里应当指出,当表示形容词和副词的同级比较时,规定语法学家要求在肯定句中使用as far as。参见as...as ,as long as/so long as。