如果你也被whereas和while的对比困扰，来看看这个最全的的总结吧~

hz1101

在做OG，GWD,PREP都遇到不少关于whereas，while的题目。但这个到底要不要平行，什么时候只需要核心含义平行什么时候要严格平行~LZ被搞晕了无数次之后终于总结出了完整的对比。（参考内容来自prep08，Elroy语法终结版）希望对大家能有一点帮助~

1.whereas = while
while前后句子之结构要求并列相对，whereas 在结构上则不一定不需要严格平行。（OG12-131）

  whereas/while这种连词连接的比较成分不要求含义上绝对的平行

2.whereas连接的平行比较只要求对比的核心逻辑上有对称关系，不要求对称位置必须是对称名词，下面句子中主从句的主语分别是energy和nuclear power并不是对称名词，但是对比的核心都是“核能发电占总产出能量的份额”：

如OG12-131 Over 75 percent of the energy produced in France derives from nuclear power, whereas nuclear power accounts for just over 33 percent of the energy produced in Germany.

*：但是如果whereas后面接介词短语，那么主句的开头也必须需要是介词短语(whereas后出现介词短语或者状语都会非常对称)如OG-113：Whereas in mammals the tiny tubes that convey nutrients to bone cells are arrayed in parallel lines, in birds the tubes form a random pattern.

如果whereas后接单纯主谓宾（或主系表），主句也要尽量用单纯的主谓宾（或主系表）来对应，如prep08 194: Whereas the honeybee’s stinger is heavily barbed and cannot be retracted from the skin, the yellow jacket’s stinger is comparatively smooth, and can therefore be pulled out and used again.
3.while 引导的从句:

1)意思是“当…时”，放句首或句中

2)意思是“转折对比contrast”时，多放在句中，也可以放在句首。while表示对比概念的时候，两个事物要是同时发生（但是while本身并没有at the same time的意思，所以while at the same time是可以prep 1-96）。

3)意思是“虽然、尽管”（让步）时，多放在句首。(=although)

4)表示条件,意为"只要",其意思和用法相当于as long as。while可位于句首,也可位于句中。


While放在句中时要特别注意，像OG12-131的A选项，ETS说while 放在中间表示“同时发生”的意思大于对比的意思。

Over 75 percent of the energy produced in France derives from nuclear power,while in Germany

it is just over 33 percent.

特里凡得琅

楼主给力呀·~

hz1101

纠结了半天总结出来，希望各位cder能够省了这个时间~~ 一起加油~~

DUKB24

在做OG，GWD,PREP都遇到不少关于whereas，while的题目。但这个到底要不要平行，什么时候只需要核心含义平行什么时候要严格平行~LZ被搞晕了无数次之后终于总结出了完整的对比。（参考内容来自prep08，Elroy语法终结版）希望对大家能有一点帮助~

1.whereas = while
while前后句子之结构要求并列相对，whereas 在结构上则不一定不需要严格平行。（OG12-131）

  whereas/while这种连词连接的比较成分不要求含义上绝对的平行

2.whereas连接的平行比较只要求对比的核心逻辑上有对称关系，不要求对称位置必须是对称名词，下面句子中主从句的主语分别是energy和nuclear power并不是对称名词，但是对比的核心都是“核能发电占总产出能量的份额”：

如OG12-131 Over 75 percent of the energy produced in France derives from nuclear power, whereas nuclear power accounts for just over 33 percent of the energy produced in Germany.

*：但是如果whereas后面接介词短语，那么主句的开头也必须需要是介词短语(whereas后出现介词短语或者状语都会非常对称)如OG-113：Whereas in mammals the tiny tubes that convey nutrients to bone cells are arrayed in parallel lines, in birds the tubes form a random pattern.

如果whereas后接单纯主谓宾（或主系表），主句也要尽量用单纯的主谓宾（或主系表）来对应，如prep08 194: Whereas the honeybee’s stinger is heavily barbed and cannot be retracted from the skin, the yellow jacket’s stinger is comparatively smooth, and can therefore be pulled out and used again.
3.while 引导的从句:

1)意思是“当…时”，放句首或句中

2)意思是“转折对比contrast”时，多放在句中，也可以放在句首。while表示对比概念的时候，两个事物要是同时发生（但是while本身并没有at the same time的意思，所以while at the same time是可以prep 1-96）。

3)意思是“虽然、尽管”（让步）时，多放在句首。(=although)

4)表示条件,意为"只要",其意思和用法相当于as long as。while可位于句首,也可位于句中。


While放在句中时要特别注意，像OG12-131的A选项，ETS说while 放在中间表示“同时发生”的意思大于对比的意思。

Over 75 percent of the energy produced in France derives from nuclear power,while in Germany

it is just over 33 percent.

-- by 会员 hz1101 (2012/10/4 16:30:34)

总结得很好，有点小小的看法


*：但是如果whereas后面接介词短语，那么主句的开头也必须需要是介词短语(whereas后出现介词短语或者状语都会非常对称)如OG-113：Whereas in mammals the tiny tubes that convey nutrients to bone cells are arrayed in parallel lines, in birds the tubes form a random pattern.






umm


这里觉得必须用得太绝对了。。。其实所谓的对称都是为句意服务的..事实上在这个句子上面，OG的原题。只有这样子放置才能最清晰的表达出意思


但不代表能通用到所有的例子（当然whereas+介词的例子。。到目前为止我也只见过OG上有，欢迎贴其他例子讨论一下）


不过这题的其他选项反而更具有令人豁然开朗的意思，更进一步了解为什么介词这样放可以clearly convey the contrast

sisichen666

帖子不错呀，掺和一下。。嘻嘻。。找了个国外的参考，大家可以随便看看：
while, whereas, or although

The use of "while" to show contrast is common and accepted in informal usage. In formal writing, however, "while" should be reserved to show that two or more events occur at the same time. In the following sentence, the two events are occurring simultaneously.

Measurements were taken while the specimen was rotating in the rig.
For comparisons and contrasts, "whereas" and "although" should be used instead of "while."

Positions are logged manually, whereas temperatures and pressures are recorded automatically by the thin-film sensors.
These two events happen in different ways. They do not necessarily occur at the same time.

Although positions are logged manually, temperatures and pressures are recorded automatically by the thin-film sensors.
The meaning of this sentence is similar to the previous one, but it places more emphasis on the differences between the two events.

Indiscriminate use of "while" where "whereas" or "although" would be more appropriate can even result in ambiguity and misunderstanding:

While my cat, Princess, eats quickly, she enjoys a leisurely stroll.
Does she do both at the same time? Using "whereas" or "although" in this sentence would clear up the confusion.

icewaterkira

thx~学习了~

gmf

总结的太好了！

dancingrain

请教楼主，什么叫做  whereas/while这种连词连接的比较成分不要求含义上绝对的平行
能帮忙举个例子吗

YvaineDing

whereas a ramjet generally cannot achieve high speeds without the initial assistance of a rocket, a scramjet, or supersonic combustion ramjet, can attain high speeds by reducing airflow compression at the entrance of the engine and letting air pass through as supersonic speeds. 这句话也是whereas表示对比前后两者的情况，我有疑问是第二个分句中是不是少了个主语，如果在whereas中的前后两个分句的主语的一致的，第二个分句的主语可否省略？

超超为杰

学习啦！！