GMAT备考容易被忽略的语法知识介词 GMAT考试

　　例题3
　　Most states impose limitations on the authority of the legislature to borrow money, with their objectives being to protect taxpayers and the credit of the state government.
　　A. to borrow money, with their objectives being to protect
　　B. to borrow money, the objectives of which are the protecting of
　　C. to borrow money, limitations intended to protect
　　D. for borrowing money, of which the objective is protecting
　　E. for borrowing money, limitations with the intent of protecting
　　By
　　by表示”通过什么方式”，等同于through的用法，往往也会在选项中和介词短语in一起考察。
　　例题4
　　Each year companies in the United States could save as much as $58 billion annually by preventing illness among employees and gain as much as $200 billion through improving performance of workers if they simply provided offices with cleaner air.
　　A. annually by preventing illness among employees and gain as much as $200 billion through improving performance of workers if they simply provided
　　B. annually if they prevented employee illness and gain as much as $200 billion through worker performance improved by simply providing

　　C. annually in employee illness prevention and gain as much as $200 billion through worker performance improved by simply providing
　　D. in employee illness prevention and gain as much as $200 billion through improving performance of workers if they simply provided
　　E. by preventing illness among employees and gain as much as $200 billion through improved worker performance if they simply provided
　　On
　　on表示”在什么方面”， 一般考察的比较少，通常涉及到一些固定用法。比如：focus onconcentrate on 等。
　　除了掌握这些介词的含义，同学们还需要了解和介词有关的一些语法规律。
　　介词放句首三原则介词短语表示方式，时间，地点，作状语，修饰句子，不要求逻辑主语一致。介词短语表示比较：如besides, like等，要求逻辑主语一致。介词加上一个动作构成短语，要求逻辑主语一致，因为动作的执行者是主语。