自己总结了特别纠结的while的用法

Niicole

谢谢～

Basquiat

感谢分享！               

lw902

顶楼主！

那可不可以用while前后的时态来排除呢？

目前来看，在while+complete sentence 里，有三种意思：同时或转折或让步1、在while表同时和转折时，主从句同时发生，时态一致（主将从现这个就不赘述了）。如果选项里while前后不同时则排除，就如楼主最后一个prep例子。（特别地，当遇到时态一致的转折时，如果选项里有whereas等转折意味更明显的词则更优，以避免while歧义，就如下面楼主提到的例子）

OG：
Over 75 percent of the energy produced in France derives from nuclear power, while in
Germany it is just over 33 percent.
OG解释错误的原因：While is somewhat ambiguous, since it might indicate simultaneity rather than contrast
正确答案：whereas nuclear power accounts for just over 33 percent of the energy produced in Germany

当然这个错误选项里的 it 也可以帮助排除

2、在while表让步时，主从句可以不同时，所以不适用排除。例 While Hans Holbein the Younger is most often identified with his English portraits, scholars have long recognized him as a superb draftsman and a remarkably versatile artist who was fundamental in synthesizing the novelties of the Italian Renaissance with the rational tradition of Northern Europe.

可以这样理解吗~求指教

echodyx

顶楼主！
有一个问题，while从句是不是不可以用现在完成时？

joii

顶楼主！               

蟹黄味蚕豆

感谢分享！               

gemmarong

看一下！               

AMBER513

感谢分享！               

woxiao_

顶楼主！               

Griya小扇

好棒 谢谢你 我刚刚还在因为一道题纠结while的用法
刚好也贴上来分享给大家
After several years of rapid growth, the health care company became one of the largest health care providers in the metropolitan area, while it then proved unable to handle the increase in business, falling months behind in its payment to doctors and hospitals.
A. while it then proved unable to handle the increase in business, falling months behind in its payment to  
B. while it then proved unable to handle the increase in business and fell months behind in its payment to  
C. but then it proved unable to handle the increase in business, falling months behind in its paying  
D. but then proving unable to handle the increase in business, falling months behind in paying  
E. but then proved unable to handle the increase in business, falling months behind in paying

CA:E