高考语法：主语从句讲解和练习 学案 2023届高考英语二轮复习

高考语法：主语从句 一、概念: 在复合句中充当主语的从句叫主语从句。常用 it作形式主语，主语从句后置。 1. That the daughter displayed an air of impatience was obvious. 2. =It is obvious that the daughter dispalyed an air of impatience. 3. 2. Whether the new book will sell well  remains to be seen.  =It remains to be seen whether ...  3. How the Great Wall  was constructed without advanced technology and tools in ancient times remains a mystery. 二、常用连接词: that  只起引导作用（从句为陈述句），不充当任何成分，没有实际意义，但不可省略。 That he kept cutting in on our conversation really annoyed us. That the astronomers survived the accident in the circumstances is a miracle.  That Lucy came first in the writing contest came as no surprise to us. whether 起引导作用（从句为一般疑问句，但用陈述语序），不充当任何成分，含义为“是否”，不可省略。不可用if代替。 1. It was unclear whether all the crew on board were still alive after the strong storm. 2. Whether man can live on the Mars is yet to be proved. 语法填空： 1.______ the lunar probe didn’t land was a worry for the people back on the Earth. 对比： 2.______ the luanr probe didn’t land was a puzzle for the people back on the Earth. 3._____ has been calculated that nearly 85% of people have contracted  the virus in the past two weeks. 4._________ we are fascinated by the sky is evident in ancient tales from around the world, such as that of Chang’e. 5.__________ the shop assistant contracted the virus was yet to be confirmed. 6. ___________ telescopes are crucial tools for space exploration is clear. 7._________ life on other planets does exist is yet to be proved, but the signs are promising. 8. It is _________ he keeps focused on what he is doing that has contributed to his great progress in his career. Keys：1.That  2. Why  3.It   4. That  5. Whether   6. That   7. Whether   8. that 二、常用连接词: Wh-words what, who, whom, which (哪一个，哪一些), when, where, how, why, whoever, whatever, ... 起引导作用，充当主语，宾语，定语，状语等。不可省略。 What --- 什么，什么...东西/事物 1.What we need most are popular sicence books, which usually explain basic principles of nature in a simple and interesting way.  2.Wh