Unit 2 Out of This World Grammar and usage 主语从句课件-2022-2023学年高中英语牛津译林版（2020）选择性必修第三册

a noun, noun phrase or pronoun representing the person or thing ① that performs the action of the verb ②about which sth is stated ③in a passive sentence, that is affected by the action of the verb I sat down. The house is very old. The tree was blown down in the storm. Lead in Underline the subjects of the following sentences. 1. David arrived last night. 2. How can we improve our English? 3. Looking up all the new words in the dictionary took him a lot of time. 4. To translate this ideal into reality needs hard work. 5. What has happened proves that our policy is right. 6. How we improve English is an important question. 1. What do the subjects of the last two sentences have incommon?2. What is the difference in word order between the second and the last? Subject clauses (主语从句) 在复合句中，如作主语的是一个从句，该从句被称为主语从句。主语从句必须用陈述语序。 Definition Do you know what they are? FAST (Five-hundred-meter Aperture Spherical Telescope) 500米口径球面射电望远镜，也被称为“中国天眼” Galileo telescope Exploring the rules Below is a newspaper feature article on the use of telescopes to explore space. Find the sentences with subject clauses. ( ) ( ) ( ) ( ) 1. That Hubble is based in space allows it to see further than ground-based telescopes, … 2. Whether life on other planets does exist is yet to be proved, but the signs are promising... 3. It is clear that telescopes are crucial tools for space exploration and that developing the required technology will help astronomers all over the world make exciting discoveries. 4. How much we will learn from the telescopes is merely limited by our imagination. that whether it 从属连词：that，whether，if 连接代词：what，which，who，whom，whose， whatever，whichever，wh