Unit1 Using Language 课件-2022-2023学年高中英语外研版（2019）选择性必修第三册

Unit 1 Face values Discover useful stuctures -Subject Clause (1) 一、什么是主语从句? Circle the subject in each sentence. She is right. What she said is right. Task 1 什么是主语从句？ 在复合句中，用作 称为主语从句。 主语的从句 subject clause 4 What we need is time. That my brother went to school makes me happy. Whether life exists on other planets is not clear yet. Who will go to the college is still uncertain. Where I could buy the book is uncertain now. Why he didn’t come yesterday is unknown. When he will go abroad is being discussed. How she keeps healthy is a secret. Underline the subject clauses and circle the conjunctions in each sentence. Task 2 who that how whether 二、主语从句的引导词 what where when why what 小结： 当从句成分缺少 ，且意义是“ ”时，引导词用 。 主语、 what 什么 ② What we need is time. 宾语 ① What is known to us is that time is important. that 小结： 当从句成分中 时，引导词用 。that 词义， 翻译。 什么都不缺 that 无 不 That my brother went to school makes me happy. who 小结： 在从句成分中缺 ，且指 时，引导词用 。 主语 Who will go to the key college is still uncertain. 人 who whether 小结： 在从句中, whether 翻译为 。 “是否” Whether life exists on other planets is not clear yet. where 小结： 遵循缺什么补什么原则。where指 。 Where I could buy the book is uncertain now . 地点 why 小结： 遵循 原则。why 指 。 Why he didn’t come yesterday is unknown. 原因 缺什么补什么 when 小结： 遵循 原则。when指 。 When he will go abroad is being discussed. 时间 缺什么补什么 how 小结： 遵循 原则。how指 。 How she keeps healthy is a secret. 方式 缺什么补什么 who that how whether the conjunctions of subject clause what where when why That my brother went to school makes me happy. 主语 谓语 三、it 做形式主语的主语从句 有时为了保持句子平衡，避免“头重脚轻”，我们会用到it做形式主语。 ② It is happy (for me) that my brother went to scho