OG 12 74 时态问题

460226813 · 发表于 2012-10-24 07:49:19

74. A 1972 agreement between Canada and the United States

reduced the amountof phosphates

that municipalities had been allowed todump into the Great Lakes.

(A) reduced the amount of phosphates that municipalitieshad been allowed to dump

(B) reduced the phosphate amount that municipalitieshad been dumping

(C) reduces the phosphate amountmunicipalities have been allowed to dump

(D) reducedthe amount of phosphates that municipalities are allowed to dump

(E) reduces the amount of phosphatesallowed for dumping by municipalities

只有一点不是很明确。。 C这里的现在完成时为甚么不对呢 OG上说 HAVE BEEN ALLOWED SHOULD BE ARE ALLOWED

按理说应该可以的啊

求个解释

460226813 · 发表于 2012-10-24 07:55:51

460226813 · 发表于 2012-10-24 07:59:42

求真相

460226813 · 发表于 2012-10-24 08:09:34

求解释啊真的不是很清楚

frankhan55 · 发表于 2012-10-24 10:04:10

quote og12 p722, and i think this explanation makes sense.'the past perfect verb have been allowed should instead be the present are allowed (if the agreement remained in effect qhen sentence was written) or the past were allowed(if the agreement was no longer in effect when the sentence was written).

狮灵鹭智 · 发表于 2012-10-24 21:21:45

个人觉得问题不是出在时态上，而是出在后面定语从句municipalities have been allowed to dump修饰的词上。

D选项中，从句修饰的是amount，可是amount是不能被dump的，所以错误
C选项中，从句修饰的是phosphate，这个是可以被dump的，所以正确。

至于时态，我觉得have been done没有太大问题。但是had been done是绝对错误的，因为had been done代表的时间是从过去一直到agreement签订的一段时间，这段时间里的phosphate amount是不可能减少的。

ShortWave小微 · 发表于 2013-5-1 10:36:36

狮灵鹭智发表于 2012-10-24 21:21
个人觉得问题不是出在时态上，而是出在后面定语从句municipalities have been allowed to dump修饰的词上。 ...

谢谢！豁然开朗吖

OG 12 74 时态问题

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