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　　考了whose/which

　　限制性定语从句和非限制性定语从句--from海词

　　一，限制性定语从句：

　　限制性定语从句对先行词起限制、修饰的作用，关系代词有that,which,whom,who,whose以及关系副词when,where等，没有明显的逗号把从句与主语分开，表达的意思为被修饰词的一个定语。

　　例句：

　　Do you know the professor who is speaking at the meeting?

　　Where is the book which I bought this morning?

　　二，非限制性定语从句：

　　作用相当于一种插入语或者对先行词的一种解释，和先行词之间只有比较松散的关系，文字中常常用逗号将其与主句分开，用法其实与限制性定语从句极为相似，只是不能用that做修饰词。

　　例句：

　　This letter is from his parents, who are working in Tibet.

　　Englishi is an important subject, which every students should study well.

　　The building, in front of which sat a boy, was a school.

　　242. (GWD-1-Q38)

　　Retail sales rose 8/10 of 1 percent in August, intensifying expectations that personal spending in the July-September quarter more than doubled that of the 1.4 percent growth rate in personal spending for the previous quarter.

　　A. that personal spending in the July-September quarter more than doubled that of

　　B. that personal spending in the July-September quarter would more than double

　　C. of personal spending in the July-September quarter, that it more than doubled

　　D. of personal spending in the July-September quarter more than doubling that of (B)

　　E. of personal spending in the July-September quarter, that it would more than double that of

　　题目释义：…, intensifying expectation that PS in J-S quarter would more than double the 1.4 percent growth rate in PS for the previous quarter.

　　考点：

　　动词形式(Verb form);逻辑含义(Logical predication)

　　1. expectations表达将来预测的含义，用同位语从句更能体现时态的精准，而且如果用了of从属结构显得冗长累赘，句意表达不清。

　　2. more than double the 1.4 percent growth rate，其中double是动词，more than是副词。

　　3. 对于more than doubled或is more than doubled的区分技巧：把more than脱去不看，doubled是一般过去时，而is doubled是被动语态

　　选项分析：

　　A. that跟在expectations后面表示具体内容;expectations的内容没有实现，不能用过去时;that没有指代。

　　B. correct;Would在这里表示expectation的内容没有实现。

　　C. 整个句式awkward，that为同位语从句引导词与of平行共同修饰expectations，其实没有必要先说一遍topic再接着详述，像B一样直接详述即可;doubled时态错误

　　D. Of短语无法明确表明expectations的核心内容，应该用同位语从句

　　E. 句式awkward错误同C

　　OG12-16的解释：

　　Verb form; Logical predication

　　The sentence explains the expectations that resulted from a past retail sales trend. Since expectations look to the future but are not yet realized, the relative clause explaining these expectations should be conditional, employing the auxiliary verb would.

　　A The simple past-tense verb form does not express the forward-looking sense of expectations.

　　B Correct. By using the verb would double, this concise sentence indicates that the expectation has not yet been realized.

　　C This construction is awkward, announcing the topic (personal spending) and then elaborating in a relative clause that restates this topic as it.

　　D Although this option is not technically wrong, it is less clear and graceful than B.

　　E Like option C, this sentence is awkward and unnecessarily wordy, announcing the topic and then using an additional clause to elaborate on it.

　　以上就是3月18日GMAT语法的全部内容，分享给大家，复习语法的时候非常希望把同一个语法点的正确句子放在一起看，能够更加感受到这个语法点的具体用法。大家不妨尝试一下。