合句题的出题频率很高，而这个类型的题目其实是对句法和逻辑的综合考察。

　　最常见的题干就是：Which choice most effectively combines the underlined sentence?

　　判断句子之间的逻辑关系是做题的重要步骤。

　　常见的关系做了一个梳理

　　1、原因because, since, as, for, result from, due to, owing to, thanks to

　　2、结果so, therefore, thus, consequently, thereby, eventually

　　3、转折让步but, however, yet, on the other hand, instead of, rather than, whereas, nevertheless, nonetheless

　　still, though, although, even though, even if, despite, in spite of

　　4、对比like, similarly, unlike, on the contrary, by contrast, by comparison, compared with, otherwise

　　5、并列递进and, also, besides, after all, in addition, similarly, likewise, as well as, apart from, furthermore,

　　moreover, not only ... but also…, still, in particular

　　6、顺序first, initially, to begin with, to the end, second, third, then, next, finally, earlier, later, after, before,

　　still, afterward

　　7、举例解释for example, for instance, take…as an example, such as, including

　　8、总结in conclusion, in summary, in brief, in short, in a word, in all, to sum up, to conclude

　　常见逻辑关系有因果关系、转折让步关系、对比关系、并列递进关系、顺序关系、举例解释关系和总结关系。

　　因果关系是指前一个句子或分句是导致后一个句子或分句结果的必然条件;

　　转折让步关系是句子内部和句子之间语义上包含对立的信息，但是句子强调的重点不同，让步后面的内容不是该句子的重要信息，强调句子其余部分，转折信息强调得是转折词后面内容;

　　对比关系是对两个或多个信息进行比较，一般分为相同信息例如使用逻辑词similarly连接句子和相反信息例如使用逻辑词on the contrary 连接句子;

　　并列递进关系是指前后句子或分句所涉及信息一致或后一句是前一句的延展;

　　顺序关系涉及到句子内部或句子之间事情发展有先后顺序;

　　举例解释是指后一句或后一个分句是前一句或前一个分句的具体细节展开;

　　总结关系是后一个句子或分句是前一个句子或分句的概括。

　　那么在题目中是如何考察的呢?

　　让同学们比较纠结的是考察对比关系和让步转折关系，转折是指句子内部和句子之间语义上出现对立信息，通常是同一事物两个方面的对立，一般是两项关联性关系，换言之，两项关联项之间不能插入其他内容。而对比关系可以是两项对比，也可以是多项对比，不一定要有对立关系。

　　Advocates of fare-free policies claim that the costs of these policies are largely offset by various savings, however, a recent study comparing projected results of fare-free policies in different cities found this outlook to be overly optimistic. (2017 年10 月北美)

　　A) NO CHANGE

　　B) savings,

　　C) savings, but

　　D) savings; and

　　答案：C

　　此题考察的就是转折关系，强调fare-free policies 的两个不同观点。

　　Because CT scanners can map objects that are impossible to excavate, CT scanning and 3-D printing can also be used to reproduce fossils that scientists cannot observe firsthand. By contrast, researchers from the National Museum of Brazil has relied on this technique to study a fossilized skeleton that was discovered protruding from a rock at an old São Paulo railroad site.(2016年5月)

　　A) NO CHANGE

　　B) Nonetheless,

　　C) Besides,

　　D) For example,

　　答案：D

　　解析：National Museum of Brazil是具体的，而前面句子是总括的，范围由大到小，所以是举例解释关系。

　　In the definition for “pictorial,” a term created by Sir Thomas Browne, Johnson described theword as one “not adopted by other writers, but elegant and useful.” By the same token, the word“writative,” which Johnson had found in the letters of Alexander Pole, was not even granted a definition.

　　A) NO CHANGE

　　B) On the other hand,

　　C) For example,

　　D) Nevertheless,

　　答案：B

　　此题考察的对比关系，是对比两个人对单词在字典里定义的问题。前后两句话并不是对关系。而且假设再加入其他人对单词在字典里的定义逻辑也说得通，所以符合对比关系。

　　Those who have seen the space consider it vital. However, that group may not be large enough; with just fourteen days to go in the fund-raising period, the campaign is only 46 percent funded.(2016年5月)

　　A) NO CHANGE

　　B) Therefore,

　　C) In effect,

　　D) As a rule,

　　答案：A

　　解析：先后关系相反，选择A(前文提到vital，后文提到not be large enough)

　　以上就是SAT语法句子合并题如何破解的全部内容，希望对考生SAT考试有一定的帮助，如有更多关于SAT考试疑问，欢迎咨询文都国际教育在线专业人士，我们为您详情解答!