英语中常见的标点符号有逗号(,) 分号(;)冒号(:)破折号(-)句号(.)标点符号的使用是让句子的意思表达更加清楚，今天我们就说一下GMAT语法冒号考察的知识点。
一、GMAT语法冒号考察的知识点：含义
冒号主要用来例举东西，为之前的事提供进一步的解释，说明。比如：There are in English two articles: the definite article and the indefinite article.
二、GMAT语法冒号考察的知识点：使用
冒号前的通常是一个句子，可以独立存在，而冒号后则无需是句子，而有时会在冒号后加入namely 或that is。
三、GMAT语法冒号考察的知识点：要说明的部分离冒号越近越好
◆ Worse: Three factors affect the rate of a reaction: concentration, surface area, and temperature.
◆ Better: The rate of a reaction is affected by three factors: concentration, surface area, and temperature.
四、GMAT语法冒号考察的知识点：与分号的区别
分号前后是完整的句子，冒号前要是完整的句子，后面表解释可以不是完整句子。
比如：
Wrong: I love listening to: classical, rock, rap, and pop music.(中文的用法)
Right: I love listening to many kinds of music: classical, rock, rap, and pop.
Right: I love listening to many kinds of music, namely, classical, rock, rap, and pop
四、GMAT语法冒号考察的知识点：真题
In 1988, the Council on Economic Priorities began publishing Shopping for a Better World, with the simple thesis of consumers having the power to change companies by the simple expedient of refusing to buy.
A. with the simple thesis of consumers having
B. which had the simple thesis of consumers having
C. where the thesis was simple: consumers having
D. with a thesis that is a simple one: consumers have (E)
E. whose thesis was simple: consumers have
答案解析：
A. 用with引导的非限定性短语做伴随状语错误，而事实上，thesis是Shopping for a Better World这本书的主题，不能作为前面整句话的伴随;thesis后面用of不好，thesis变成了某一类特定的consumers，而合理含义上应该是一个thesis应该是某个现象，因此要改为that从句(同位语从句)，或者用冒号来引出从句。
B. thesis应该用同位语从句修饰，thesis of sb. doing sth.结构中thesis的核心只是sb.，而并不是”sb做某事”
C. 关系代词where指向Shopping for a Better World不恰当;冒号后虽然可以用名词短语，但此处冒号后核心意思变成了consumers，而不是”consumers怎么怎么样”，逻辑含义不符。
D. with的错误同A;a thesis that is a simple one不简洁
E. correct;thesis的内容是”顾客有……的能力”
》》点击了解GMAT语法标点的考察
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