关于非限制性定语从句which前面是否一定要加逗号

lanningxin

prep 08

219.Fossils of the armof a sloth found in Puerto Rico in 1991, and dated at 34 million years old,made it the earliest known mammal of the Greater Antilles islands.

A.    sloth found in Puerto Rico in 1991, and dated at 34million years old, made it the earliest known mammal of

B.     sloth, that they found in Puerto Rico in 1991, hasbeen dated at 34 million years old, thus making it the earliest mammal known on

C.    sloth that was found in Puerto Rico in 1991, wasdated at 34 million years old, making this the earliest known mammal of

D.     sloth, found inPuerto Rico in 1991, have been dated at 34 million years old, making the sloththe earliest known mammal on          (D)

E.     sloth which, found in Puerto Rico in 1991, wasdated at 34 million years old, made the sloth the earliest known mammal of

LZ知道E选项是错误的，就是对解释产生了一点疑问。

prep08里面的解释说，“非限制性定语从句前应该加上逗号”。

那么，我在字典里查到的句子——Two schoolgirls were giggling at a letter which one of them had received from a boy.按照G的意思，就是错误的吗？

Fiona09

首先，非限制性定语从句前是应该加逗号的；

其次，想说明下限制性定语从句和非限制性定语从句的主要区别——在限制性定语从句中，先行词在从句中是充当一定的成分的。举个例子，This is the book which I am looking for. 先行词“book”就在从句中作宾语；而在非限制性定语从句中，先行词在从句中不充当任何成分，且从句对先行词只是起补充说明作用，去掉也不会影响全句的理解。举个例子：Water，which is a clear liquid，has many uses. LZ可以都体会下；

最后，用到字典里查到的这个句子，是正确的，先行词 a letter在从句中作的是receive的宾语。

lanningxin

Fiona09 发表于 2016-9-29 10:55
首先，非限制性定语从句前是应该加逗号的；

其次，想说明下限制性定语从句和非限制性定语从句的主要区别— ...

谢谢！可是曼哈顿语法里面说，which不可以用来引导“限定性定语从句”，只有that才可以。
是否意味着，只要是which引导的句子，全部应该加逗号？

Fiona09

which是肯定可以用来引导“限定性定语从句”，关系代词除了which, that, 还有who, whose, when, where等，随意举个列子：The tall man who is playing basketball is Yao Ming.（先行词在从句中作主语）

绝大多数情况下，which引导的非限，往往与主句都用逗号隔开呢

lanningxin

Fiona09 发表于 2016-9-29 11:45
which是肯定可以用来引导“限定性定语从句”，关系代词除了which, that, 还有who, whose, when, where等， ...

那么判断which究竟引导的是限定性还是非限定性，还是要看句子意思对嘛？
这样看来，一旦看到which前面加逗号，就得怀疑这个逗号存在的合理性咯……

Fiona09

lanningxin 发表于 2016-9-29 12:29
那么判断which究竟引导的是限定性还是非限定性，还是要看句子意思对嘛？
这样看来，一旦看到which前面加 ...

加了逗号的基本都是非限。看是限定性还是非限定性，主要是先行词在从句中充不充当成分

哈佛不是梦

Fiona09 发表于 2016-9-29 14:00
加了逗号的基本都是非限。看是限定性还是非限定性，主要是先行词在从句中充不充当成分 ...

Water, which is a kind of liquid, has many uses.
先行词water 不就是充当从句 water is a kind of liquid 主语吗？

emmahiggins09

Fiona09 发表于 2016-9-29 11:45
which是肯定可以用来引导“限定性定语从句”，关系代词除了which, that, 还有who, whose, when, where等， ...

容我指出一个GMAC的规矩： which 不能引导限制性定语从句 至少在GMAT中是不可以的

emmahiggins09

lanningxin 发表于 2016-9-29 11:30
谢谢！可是曼哈顿语法里面说，which不可以用来引导“限定性定语从句”，只有that才可以。
是否意味着，只 ...

曼哈顿说的没错，在G的世界里 which 不能引导限制性定语从句。但是除了G以外的世界里which 是可以引导限制性定语从句的

Fiona09

emmahiggins09 发表于 2017-3-1 07:02
容我指出一个GMAC的规矩： which 不能引导限制性定语从句 至少在GMAT中是不可以的 ...

which是可以引导限制性定语从句的，举个栗子：

A shop should keep a stock of those goods which sell best. 商店应存有最畅销的货物