GMAT繁杂世界，关注一个就够了 导语“状语从句省略非常接近我们前一篇所提到的逻辑主语，但和逻辑主语不同的是，这个知识点也会衍生出一些很独特的考点，所以我们在这里单独将这个知识点作为一篇来讲。 省略条件首先，我们要明确一个概念，状语从句并不是随意就可以省略的。 例如，Although I love you, I do not deserve you. 在这个例句中，如果我觉得主语 I 是重复的，可以直接省略掉，变成Although love you, I do not deserve you. 这样正确吗？答案是错误，因为状语从句的省略必须满足以下几个条件： 1要有状语从句的引导词 一般都为：(1) when / while (2) although /(even )though (3) if /unless 2从句必须是 S + be 结构 省略的第二个条件是从句内部必须是“主语＋be动词”的结构，否则一定不能省略。刚刚我们的例句中，状语从句 although I love you 则不符合“主语＋be动词”结构，所以不可以省略。 3从句主语=主句主语 这就要保证前后主从句的主语必须是一致的，才可以省略，且省略的时候必须将整个“主语＋be动词”结构省略掉。
举个例子 While he was alive, he lived . 可以直接省略成While alive, he lived. 以上三个条件必须全部满足才可以省略，缺一不可！ 省略是否正确的判断 当然，在实际的考查过程中，一般不会让我们判断是否能够省略。题目往往会给出省略后的状语从句，而错误选项就会伴随着错误的省略。对于已经省略的状语从句，我们要判断省略是否正确，直接通过逻辑主语判断即可。
举个例子1While driving down the road, Tom was attracted by the beautiful building. 从逻辑主语判断，Tom 是 driving 动作发出者，省略正确。 省略前的完整句子是：While Tom was driving down the road, Tom was attracted by the beautiful building. 举个例子2Although rejected by many investors, the team is still persisting. The team 是 rejected 动作的接受者，所以状语从句省略正确。 补充完全的句子是：Although the team is rejected by many investors, the team is still persisting. 最后，再重申一下判定的原则：若状语从句已经省略，直接判断逻辑主语是否正确即可。 学以致用1Thoughsubject to the same wild - animal control efforts that killed off almost all the wolves in North America over the past century , coyote ’ s amazing ability to adapt to the presence of humans has enabled it to expend its range into Alaska and Central America. A. coyote ’ s amazing ability to adapt to the presence of humans has enabled it to expend itsB. coyote , because of its amazing ability to adapt to the presence of humans , has been able to expand its1思维标签状语从句省略2解决方案绿色高亮部分是省略之后剩下的形容词结构，此结构必须修饰主句主语才合适。而A选项的 ability 和 subject to 结构互相修饰并不合适，ability 作主语会出现逻辑主语错误的问题。subject to 修饰 coyote 比较合适。3结论选B 考点套路在 SC 的考试中，状语从句常见的考法是， 对于一些明明在省略后很正确的状语从句，有的选项故意不省略“S +be” 结构 。这时候要注意，这些不省略的状语从句会针对“S +be”结构进行考点设计。 考点往往从两个方面设置：
1S 主语的代词指代是否正确 代词部分的考点往往是两种，第一种就是代词单复数是否正确，第二种就是同一个代词试图指代不同名词，如果你还是不太熟悉，可以看看我们后续的【语法-代词篇】。 2be 的时态使用是否正确这里的使用参照我们在时态篇中提到的时态判断准则即可。 当然这里有一个小窍门：当你发现选项的差异只是状语从句的省略部分时，如果你通过逻辑主语的判断很确定省略是正确的，那未省略的选项基本都是按照以上套路设置的错误选项。 学以致用2Rising inventories , if they were unaccompanied by corresponding sales increases, can lead to production cutbacks that would hamper economic growth. A. if they were unaccompanied by corresponding sales increasesB. if not accompanied by corresponding increases in sales1思维标签状语从句省略2解决方案状语从句省略，这里代词they使用正确，但是条件状语从句内部时态 were unaccompanied 为过去不正确，因为根据主从句时态一致原则，主句时态can lead to是一般现在时态，要求现在对应现在。 3结论选B 学以致用3Industrialization and modern methods of insect control have improved the standard of living around the globe while at the same time they have introduced some 100 , 000 dangerous chemical pollutants , having gone virtually unregulated since they were developed more than 50 years ago. A. while at the same time they have introduced some 100 , 000 dangerous chemical pollutants , havingB. while at the same time introducing some 100 , 000 dangerous chemical pollutants that haveC. while they have introduced some 100 , 000 dangerous chemical pollutants at the same time , which haveD. but introducing some 100 , 000 dangerous chemical pollutants at the same time that haveE. but at the same time introducing some 100 , 000 dangerous chemical pollutants , having思维标签解析：Industrialization and modern methods of insect control have improved the standard of living around the globe while at the same time they have introduced some 100 , 000 dangerous chemical pollutants , having gone virtually unregulated since they were developed more than 50 years ago. A. while at the same time they have introduced some 100 , 000 dangerous chemical pollutants , havingB. while at the same time introducing some 100 , 000 dangerous chemical pollutants that haveC. while they have introduced some 100 , 000 dangerous chemical pollutants at the same time , which haveD. but introducing some 100 , 000 dangerous chemical pollutants at the same time that haveE. but at the same time introducing some 100 , 000 dangerous chemical pollutants , having1思维标签平行结构2解决方案but要求自己前后要平行，DE选项but后面的introducing在前面找不到合理的平行对象。3结论选项DE错 Industrialization and modern methods of insect control have improved the standard of living around the globe while at the same time they have introduced some 100 , 000 dangerous chemical pollutants , having gone virtually unregulated since they were developed more than 50 years ago. A. while at the same time they have introduced some 100 , 000 dangerous chemical pollutants , havingB. while at the same time introducing some 100 , 000 dangerous chemical pollutants that haveC. while they have introduced some 100 , 000 dangerous chemical pollutants at the same time , which have1思维标签状语从句省略中的代词2解决方案选项中的代词they试图指代Industrialization and modern methods，未划线的代词they却试图指代名词chemical pollutants，同一代词试图指代不同的名词。3结论AC错误，选B 常见误区状语从句省略后，从句内部往往是非常简洁的 doing或done 结构，比如while driving down the road这里的driving就是干净的doing。再比如although rejected by …这里的rejected是干净的done的结构。 但在考试中，有些选项在状语从句省略之后，变成了Although being rejected…; Although having been rejected…; 或者while having drove down the road… 这些形式，这种情况一定错误。 因为当我们把这些状语的省略还原后，加上“主语＋be”结构，句子将变成“四不像”，根本无法成为合理正确的从句。 再总结一下，省略的状语从句中出现以下三种样子，一定错误：引导词+being+done引导词+having been+done引导词+having+done 必错结构这里我们提到了having和being，所以在本篇的最后，霞姐再发散地讲解一个知识点。 在having和being的使用中，有以下“必错”的情况，能帮助你迅速排除错误选项。 being必错的三种情况：being＋n／adj （being多余错）there being （there要对只有there be结构才可以）n＋being done（being多余错） having必错的两种情况：n＋having donen＋having been done 这两种情况都属于不简洁错误，正确的直接用doing和done作后置定语即可。 霞姐GMAT是啥？“霞姐GMAT”是由魔力学院创始人，原新东方GMAT名师张海霞根据自己多年的教学和创业经验整理出的一系列GMAT干货作品。 “霞姐GMAT”是一本书，它虽不能被称为“GMAT”圣经，但它无微不至，试图让更多GMAT的备考者远离繁杂无章的各种学习资料，只用好一本书解决所有的GMAT问题。 “霞姐GMAT”也是一种方法，通往GMAT的成功道路有很多条，但我们希望这条我们倡导的“思维路径”是一条最快，最轻松的道路。 谁是霞姐？张海霞，江湖人称“霞姐”。 从北大学霸到新东方名师，从新东方名师到最美丽的创业者。自2010年起在新东方讲授GMAT语法等课程，强调通过系统的语法学习来全面提升英语的写作、阅读等综合能力。曾创造新东方史上前无古人后无来者的公开课78人全满分记录；三个月玩虐考研跨考，从北航考入北大，“看透”是快速“突破”的唯一出路。讲课气场强大、逻辑严谨，风趣幽默，自认为已摸透GMAC老头们的出题套路。曾有学员上完课后赞曰“你的课太强大了，我语法肯定可以全对”。