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OG 12 SC 74

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楼主
发表于 2012-4-15 23:37:20 | 只看该作者 回帖奖励 |倒序浏览 |阅读模式
A 1972 agreement between Canada and the United
States reduced the amount of phosphates that
municipalities had been allowed to dump
into the
Great Lakes.
(A) reduced the amount of phosphates that
municipalities had been allowed to dump
(B) reduced the phosphate amount that
municipalities had been dumping
(C) reduces the phosphate amount municipalities
have been allowed to dump
(D) reduced the amount of phosphates that
municipalities are allowed to dump
(E) reduces the amount of phosphates allowed for
dumping by municipalities
OG 解释说had been 时态不对,应该用are allowed 表示过去持续到现在仍有效,那可不可以用havebeen 表示持续到现在仍有效呢?
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沙发
发表于 2012-4-19 14:15:08 | 只看该作者
开始也不明白,看了一下Manhattan,大概明白了。

Do not une the perfect tense when the simple tense will do. The GMAT prefer simplicy.

Wrong: Joe learned about an epoch in which dinosaurs had walked the earth.
Right: Joe learned about an epoch in which dinosaurs walked the earth.

in the first example, the past perfect had walked is unecessary. Although the action had walked does take earlier than the action learned, th eariler action does not bearing on the context of the later action. The sequence of time does not need to be clarified or emphasized. Thus, the past perfect is considered wrong in this context.

You should use the pefect tense only when you can justify them with the rules described in these sections. if an action begin in the past and continue to the present (or its effect does), use the present perfect tense. If one action in the past precedes another, and you need to clarify or emphasize the time sequence, then use the past pefect. Otherwise, stick to the simple tenses.

从74来说, 虽然被允许排放到河里这个动作是早于降低排放,但是这是两个并不太具有关联性的动作。一个是居民被允许,一个是agreement降低,两个动作的主语都不一样。并且该句话也并没有强调该动作发生的时间顺序。所以不能用完成时态,只能用一般时态。
最后我的感觉是,貌似GMAT很喜欢考A说了(simple past)一个事:“B干嘛干嘛了”
如果选项里这个B干嘛干嘛了用的是 perfect tense, 基本上都不对。
板凳
发表于 2012-4-19 14:21:10 | 只看该作者
甚至还有这种情况:

The brand U2 was just one of many new groups on the rock music scene in the early 1980's, but less than then years later, U2 HAD fully ECLIPSED its early rivals in the pantheonof popular music.

这样用是对的
地板
发表于 2012-4-25 10:01:42 | 只看该作者
这样用为什么是对的,请指教?
甚至还有这种情况:

The brand U2 was just one of many new groups on the rock music scene in the early 1980's, but less than then years later, U2 HAD fully ECLIPSED its early rivals in the pantheonof popular music.

这样用是对的
-- by 会员 ximenheng (2012/4/19 14:21:10)

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