However, the GMAT has acknowledged that this which/that differentiation is controversial, so the GMAT is unlikely to make this distinction the make-or-break issue for any answer choice. 这里说由于whic/that在引导从句的差异上尚有争议，所以此点在GMAT中不会拿这个作为判断选项对错的考点。
但是因为我比较较真儿！还是想问一下！在page98中，在修正和解释错误句子“9. Of all the earthquakes in European history, the earthquake, which destroyed Lisbon in 1755, is perhaps the most famous. ”的时候说：To correct the sentence, we must remove the commas and replace which with that. 建议修改为Of all the earthquakes in European history, the earthquake that destroyed Lisbonin 1755 is perhaps the most famous
GMAT 本来就是选择题。作者: kasudi 时间: 2013-3-7 09:07
在GMAT中，the earthquake which destroyed Lisbon in 1755 is perhaps the most famous. 应该不能用吧，因为which一般做非限定性定语，一般用于“逗号+which”，或者“介词+which” ，用于紧邻修饰，或者跳跃修饰，但一般不用做限定性定语从句。作者: kasudi 时间: 2013-3-7 09:29 翻看以前旧帖，看到 suri在奋斗 对这道题的解释，觉得很好，这里引用下~~~
“先弄清楚非限定定语从句的意思 Non-essential Modifiers provide extra information. You do not need this information to identify the noun, since it is already identified in some other way. Moreover, you can forget about a non-essential modifier afterward, in a sense; any later reference to the noun does not include that extra information. 翻一下manhattan 97页 Of all the earthquakes in European history, the earthquake, which destroyed Lisbon in 1755, is perhaps the most famous. Which destroyed Lisbon in 1755: INCORRECT. This clause is wrong because the commas that enclose it make it a non-essential clause. The logic of the sentence calls for an essential clause to make clear which earthquake is the most famous. (If you remove the relative clause, you get the very mysterious sentence Of all the earthquakes in European history, the earthquake is perhaps the most famous.) To correct the sentence, we must remove the commas and replace which with that. 在这里用which做定语从句来修饰这个地震，由于which引导的限定性定语从句提供的是extra information我们可以把这个定语从句去掉，看对句子意思有米有影响 去掉后看就是manhattan上面说的 (If you remove the relative clause, you get the very mysterious sentence Of all the earthquakes in European history, the earthquake is perhaps the most famous.） 造成语义模糊究竟是哪一场地震 所以在这里是错误的 要改成是that，就是发生在1755年的地震
所以A和B中，A更好”作者: wangziann 时间: 2013-3-12 11:53
kasudi ，非常清晰，谢谢！作者: ranran603 时间: 2013-7-5 19:08
好贴!问了我想问的,解释也非常好.赞个!!作者: baby070501 时间: 2013-7-27 22:30
我想接着问一句
which 引导的限制性定语从句提供的就是extra information呢？作者: lily510 时间: 2014-7-1 17:03
这个解释真的非常棒，一目了然，我正好也在纠结og 13 sc55 题，贴上来共同学习一下
55. Many house builders offer rent-to-buy programs that enable a family with insufficient savings for a conventional down payment to be able to move into new housing and to apply part of the rent to a purchase later.
(A) programs that enable a family with insufficient savings for a conventional down payment to be able to move into new housing and to apply
(B) programs that enable a family with insufficient savings for a conventional down payment to move into new housing and to apply
(C) programs; that enables a family with insufficient savings for a conventional down payment to move into new housing, to apply
(D) programs, which enables a family with insufficient savings for a conventional down payment to move into new housing, applying
(E) programs, which enable a family with insufficient savings for a conventional down payment to be able to move into new housing, applying
关于E选项 og 的解释有说 the comma after programs is incorrect because the clause is meant to be restrictive 。
按照6楼的说法就能解释 此处限制性定从的要求了。作者: PhoenixPenn 时间: 2014-9-13 07:34
谢谢楼上各位分享，现在这个问题已经很清楚了
