新东方在线整理了2020考研英语语法，供参考。
强调句构成及处理
●强调句的构成：
It is +被强调部分+that( who ) +句子其他成分
【解析】现在时间为is;过去时间为was;被强调部分为动词外的任何成分;强调对象为人则用who或者that;强调对象为物则只能用that;句子的其他成分为正常语序。
●强调句的处理方法：
去掉强调格式后，将被强调部分还原到句子中。
例1：It was she , a Baltimore printer , who published the first offcial copies of the Declaration , the first included the names of its signers and therefore heralded the support of all thirteen colonies .
【解析】
去掉强调格式后，还原句子为：She , a Baltimore printer , published the first official copies of the Declaration , the first copies that included the names of its signers and therefore heralded the support of all thirteen colonies 被强调对象为主与。
【译文】
她，巴尔的摩的印刷商，出版了第一本官方的《独立宣言》在这个版本里包含有每个签署者的名字，这样一来就表明了全部十三个殖民地的支持。
例2：Thus , in the American economic system it is the demand of individual consumers , coupled with the desire of businessmen to maximize profits and the desire of individuals to maximize their incomes , that together determine what shall be produced and how resources are used to produce it .
【解析】
去掉强调格式以后，句子还原为：Thus , in the American economic system ，the system , the demand of individual consumers , coupled with the desirs of businessmen to maximize profits and the desire of individuals to maximize their incomes , together determine what shall be produced and how resources are used to produce it .被强调对象为主语。
【译文】于是，在美国的经济系统中，个人消费者的需求，商人利润最大化的欲望及个人收入最大化的渴求，共同决定了应该生产什么产品，以及如何利用资源来成产这些产品。
例3：It was just a decade before this that many drug companies had found their vitamin sales skyrocketing and were quick to supply practicing physicians with generous samples of vitamins and literature extolling the virtue of supplementation for a variety of health-related conditions.