SAT语法陷阱|你真的知道while的意思吗？

　　SAT语法陷阱|你真的知道while的意思吗？看到这个标题，一些小伙伴估计笑了。while？so easy! 小学就学了，不就是 “当…时候” 的意思吗？少年啊，too young too simple！

　　你只知其一不知其二啊，while 看似简单，但在SAT语法中，却有3种考法，对应while 的3个意思。且看下文分解~

　　Round 1

　　You use while, before making a statement, in order to introduce information that partly conflicts with your statement.

　　这个用法就是while表让步，表示虽然、尽管的意思，类似于although。

　　While the numbers of such developments are relatively small, the potential market is large...

　　尽管这种增长的数量相对较小，但是潜在的市场是巨大的。

　　这个用法下的考点是大家都学过的：although不能和 but，however, therefore等连用

　　真题解析

　　2018-03-北美 (38)

　　While scientists may debate the methods used to calculate this probability of extinction, therefore, the set number of years would need to be defined.

　　A) NO CHANGE

　　B) and

　　C) even, so

　　D) DELETE the underline portion

　　解答：句首while“虽然”，后面不能有therefore, however 等词

　　Round 2

　　You use while at the beginning of a clause to introduce information which contrasts with information in the main clause.

　　这句话里while的意思是却、但是，这个用法就是表转折，和but类似，只表示两句话 “对比”，没有 “让步” 意思。

　　The first two services are free, while the third costs £35.00.  前两项服务免费，但是第三项服务要花35英镑。

　　注意，while 前有逗号。同时，我们也知道，并列句之间一定要用逗号。While 前有逗号，说明这里的while 类似并列连词。

　　真题解析

　　2018-05-北美语法passage 4,

　　Technological innovation has made components less expensive, while tax subsidies and other governmental incentive programs have offset some of the costs of installation for businesses and individuals.

　　真题解析

　　2016-05-北美（26）

　　Artists such as these Brooklyn performers find that crowdfunding exacerbates problems that already exist. Work, that is easily understood and appreciated, is supported, while more complex work goes unnoticed.

　　A) NO CHANGE

　　B) Work that is easily understood and appreciated is supported,

　　C) Work that is easily understood, and appreciated is supported

　　D) Work—that is easily understood and appreciated—is supported,

　　答案是B。有小伙伴很好奇，为什么supported 后用有逗号，但work后却没有逗号。

　　解答：that 引导的是非限定性定语从句，不能有逗号。但这里的while类似but，“对比”，前面要有逗号。容易理解的艺术有人支持，但是复杂深奥作品无人问津。

　　Round 3

　　If something happens while something else is happening, the two things are happening at the same time.

　　(表示两件事同时发生)当…的时候，在…时，也就是我们最常见的用法

　　You can go swimming while I'm having lunch.

　　我吃午饭时你可以去游泳。

　　注意：while前没有逗号。

　　真题解析

　　2018-05-北美语法passage 4,

　　Industry employees can meet demand for an environmentally friendly service while also making a good living for themselves.

　　真题解析

　　2018-05-亚太（35）

　　However, in recent years, several retailers have challenged this conventional wisdom, offering better-than-average wages and benefits, and they have done so, while keeping costs down and performing well financially.

　　A) NO CHANGE

　　B) benefits—and they have done so

　　C) benefits: and they have done so,

　　D) benefits and they have done so,

　　答案是B。同学迷惑了，while前怎么没有逗号。

　　解答：这里的while 表示两件事同时发生，while前不能有逗号。具体到本题就是，公司给员工提供高工资的同时还能降低成本，财务良好。

　　重要的事情最后再强调一遍！一定要注意while前的“逗号”！

　　今天while 考点就分享到这里，你们学会了吗？

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