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标题: gwd1-19 [打印本页]

作者: kingdoms 时间: 2006-10-9 23:30
标题: gwd1-19

Q19:

Recently physicians have determined that stomach ulcers are not caused by stress, alcohol, or rich foods, but a bacterium that dwells in the mucous lining of the stomach.

not caused by stress, alcohol, or rich foods, but
not caused by stress, alcohol, or rich foods, but are by
caused not by stress, alcohol, or rich foods, but by
caused not by stress, alcohol, and rich foods, but
caused not by stress, alcohol, and rich foods, but are by

这道题答案是C, 哪位nn讲讲为什么by不可省略? 为什么not要在caused 的后面?

多谢.

作者: yogaII 时间: 2006-10-10 03:43

平行结构：

not by x, but by y

作者: Shadowx 时间: 2006-10-10 04:14

最好的方法:

A not B but C 的句型

AB 需成立

AC 也需成立

這裡

Recently physicians have determined that stomach ulcers are caused (A) by stress, alcohol, or rich foods (B).

Recently physicians have determined that stomach ulcers are caused (A) by a bacterium that dwells in the mucous lining of the stomach.(C).

選別的你可以試試看 AC 都不太會成立

作者: kingdoms 时间: 2006-10-11 09:40

感谢,yogaII, Shadowx, 两位老兄的指点, Shadowx的方法真不错.

Thanks a lot.

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