Period 4: Grammar学习目标:1. 掌握非限制性定语从句和定语从句的缩略形式2. 体会非限制性定语从句和定语从句的区别3. 利用例句归纳出语法规则学习重点:掌握非限制性定语从句和定语从句的缩略形式学习难点:利用例句归纳出语法规则课前预习使用说明与学法指导:1. 利用例句归纳出语法规则2. 15 分钟之内完成预习自测:观察下列从 Reading and Vocabulary 中选取的句子,体会非限制性定语从句的用法。①The power of the Yangt ze River,which is the world's third longest river,h as been harnessed by the Three Gorges Dam.②The Three Gorges Dam,which is the biggest construction project in China since the building of the Great Wall and the Grand Canal,has been built to control flooding and provide hydroelectric power for the central region of China.③Sun Yatsen,who was the leader of the 1911 Revolution,first suggested the idea of a dam across the Yangtze River in 1919.[自我总结]与限制性定语从句相比,非限制性定语从句是指与主句关系不十分密切,只对主句中的先行词作 作用的定语从句。其标志是主句和从句之间用 隔开。我的疑问:__________________________________________________________________________________________________________________________________________课内探究质疑探究:非限制性定语从句非限制性定语从句用来对先行词作补充说明。没有它,主句也能独立存在;非限制性定语从句和主句的关系不密切,它与先行词之间常用逗号隔开。1. 非限制性定语从句的引导词类别引导词修饰的先行词在从句中所作成分关系代词who人主语、宾语whom人宾语which事/物或整个主句主语、宾语whose人或物定语as整个主句主语、宾语关系副词when表示时间的名词时间状语1where表示地点的名词地点状语Then he met Mary,who invited him to a party.然后他遇见了玛丽,玛丽邀请他去参加晚会。Once more I am in Beijing,where I have not been for ten years.我又来到了北京,我已有十年没有到这里来了。He was too careless,which resulted in his failure in the exam.他太粗心了,因此考试没及格。We will put off the outing until next week when we won'...