Unit 3 Using language 课件-2022-2023学年高一英语外研版（2019）必修第三册

Unit 3 The world of science Grammar www.sclyzx.com She has finished her homework. Someone has broken the window in winter on a cold day. Activity 1 Describe the pictures with Present perfect tense. He has taught in our school for 30 years. www.sclyzx.com The enemy has killed you. You have been killed by the enemy. www.sclyzx.com 现在完成时 1.现在完成时 谓语结构 主动 被动 have/has done have/has been done 2.常连用的时间状语有： recently , for+段时间，since +时间状语(从句)，these days, so far, up to now, in/ during/ over the last/ past few years/months/ weeks/hours www.sclyzx.com Activity 2 被动 1.I guess you have been asked about the title of your book before. 2. I guess someone has asked you about the title of your book before. 3.New inventions like 3D printers have been used to make replacement hearts and bone parts. 4. People have used new inventions like 3D printers to make replacement hearts and bone parts. 找出下面句子的谓语结构，哪些是主动？哪些是被动？ 被动 主动 主动 www.sclyzx.com The New Age of Invention has just been published. 2. In addition, important advances have been made in medicine and environmental science thanks to increasing computer power. 3. I’ve also been told that you’re an inventor yourself. 4. Nothing like this has been invented yet and I’d say…… Look for more sentences with the present perfect passive. www.sclyzx.com 1. Please learn the book on P48 to 49 in groups to figure out the tense. www.sclyzx.com 1. People have cut down many big trees along the road to build houses. Many big trees along the road have been cut down to build houses. 2. They have spent large quantities of money on bringing up the three children. Large quantities of money have been spent on bringing up the three children. 3. They have made the two novels into television series. The two novels have been made into television series. 2. Practise: change to be passive voice www.sclyzx.com 4. People have sent a large amount of food to the disaster area since the flood happened. A large amount of food has been sent to the disast