Part5 Unit7 Natural Disasters 课件-【中职专用】高二英语同步精品课堂（高教版2021·基础模块3）（2023修订版）

主语从句 & 表语从句 Society will prosper when the environment improves,and lose vigor as the environment degrades.生态兴则文明兴，生态衰则文明衰。 Unit 7Natural Disasters knowledge objectives ability objectives emotional objectives To learn the basic usage of subject clauses and predicative clauses. To choose the appropriate relative words of subject clauses and predicative clauses in the specific context. To cultivate the good habit of using language correctly in daily life. Learning objectives 主语从句和表语从句 It is true that these disasters are not actually all that natural. It is known that sandstorms are caused naturally by strong winds. The most important thing is how we can have more people join us. 由that引导的主语从句 由that引导的主语从句 由how引导的表语从句 主语从句 在复合句中，主语为句子的从句叫主语从句。主语从句用陈述语气，句首引导词不能省略。 That he didn’t take part in my wedding made me unhappy. 主语 句子充当主语，这个句子就是主语从句 引导词 谓语 宾语 宾补 从句用陈诉句语气 主语从句 引导词有：从属连词 that,whether,if 连接代词who,whoever,whom,what,whatever,whose,which 连接副词when,where,how,why... That he will succeed is certain. What we need is your help. It is a pity that we lost the ball. 识别主语从句 1.先找谓语，位于前的句子就是主语从句， 2.it做形式主语，从句作真正的主语，即为主语从句 主语从句 that引导的主语从句 It is certain (that) he will come. 为了使句子保持平衡，常用先行词it 做形式主语，来代替主语从句，而把主语从句放于句末。 不作成分，没有实际意义 在句首时不能省略 it作形式主语时that可省略 That he will come is certain. that在句首不能省略 形式主语 that在句末可省略 句子为真正的主语，即为主语从句 主语从句 whether/if引导的主语从句 使用形式主语it 时，if/whether 引导的名词性从句为真正的主语。 意为“是否”，不作成分不能省略， 在句首只能用whether不用if whether与or not 连在一起时不用if Whether we’ll go camping tomorrow depends on the weather. It depends on the weather whether/if we’ll go camping tomorrow. It doesn’t matter whether/if he will come or not. It doesn’t matter whethr or not he will come. 在句首只能用whether不用if 主语从句 连接代词引导的主语从句 whatever=anything that whoever=anyone who 起连接作用，不能省略，有实际意义，在句中充当主语、宾语、表语或定语 What you said yesterday was right. Who wil