高中英语人教版必修三教师版学案：Unit4Astronomythescienceofthestrars语法学案.doc

第  PAGE 3 页 共  NUMPAGES 3 页 教学内容 Learning aims: To master some sentence patterns To msater the usage of subject clauses Learning key points: To master some sentence patterns Learning difficult points: To msater the usage of subject clauses[来源:学#科#网Z#X#X#K] 【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. Its strange that he didnt come yesterday. It is reported that the number of wild animals in Africa is decreasing.[来源:学科网] 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. Who made the long distance call is not important. （2）what引导主语从句“……的东西/事情”时，可用来表示the thing(s)which这种意思，引导从句，表示一样东西与一件事情，这种用法的what称为关系代词型what，who，whom，which，what可以和ever构成合成词，和what一样引导从句，ever起强调作用。这些关系词在句子中充当成分，所以不能省略。 What I need (=The thing which I need) is a mobile phone. Whoever leaves the office (=Any one who leaves the office)should tell me.无论是谁离开办公室都应该告诉我。 五、关系副词引导的主语从句。 连接副词有when, where, why, how, however, whenever, wherever等引导主语从句时，它们在从句中担任状语，不能省略。 Why he didnt come here is not clear to anyone. How a telephone works is a question which not everyone can answer. Where she has gone is not known yet. When t