山东省泰安市肥城市第三中学高中英语 Unit 4 Astronomy the science of the strars 语法学案 新人教版必修 3教学内容Learning aims: To master some sentence patternsTo msater the usage of subject clausesLearning key points: To master some sentence patternsLearning difficult points: To msater the usage of subject clauses【学案使用说明】在提前预习的前提下完成学习指导即时感悟【回顾复习】Check the home work (have a dictation of the language points)【自主 合作 探究】一．概述在复合句中起主语作用的从句叫主语从句。引导主语从句的关联词有：从属连词 that、whether关 系 代 词 ： who, what, which , whom, whose, whatever, whoever, whomever, whichever；关系副词：when, where, how, why, however, whenever, wherever 等。（一）从属连词 that，whether 引导的主语从句。从 属连词 that，whether 在主语从句中的作用只是引导主语从句，它们在从句中不担任成分，不能省略。Whether she will come or not is still a question. That they will go is certain.三、it 作形式主语引导主语从句。如果主语从句太长，为避免句子结构头重脚轻，我们可用 it 作形式主语，而把主语从句放在主句谓语部分之后。That 引导的主语从句可用 it 代替，that 不可省略。 例如：It is a pity that she has made such a mistake.It's strange that he didn't come yesterday. It is reported that the number of wild animals in Africa is decreasing. It is said that there was a terrible plane crash this morning.四、由关系代词引导的主语从句。（1）关系代词 who, what, which, whom, whose, whatever, whoever, whomever, whichever 等，引导主语从句时，它们分别在从句中担任主语、宾语，不能省略。Whoever leaves the room last ought to turn off the lights.What you have done might do harm to other people. 、。What he said at the meeting astonished everybody present.高一主要学习书信文体，注意开头和结尾的表达1Who made the long distance call is not important.（2）what 引导主语从句“……的东西/事情”...
