Unit 3 The World of Science Using Language课件-2022-2023学年高中英语外研版（2019）必修第三册

Unit 3 The world of science Present perfect passive B3U3 动词的两种语态 主动语态（the active voice）：表示主语是动作的执行者 被动语态（ the passive voice）：表示主语是动作的承受者 We planted the trees. 主谓关系 The trees were planted by us. 动宾关系 不同时态的被动语态 现在时 过去时 将来时 过去将来时 一般时 进行时 ---------- ---------- 完成时 ---------- ------------- is/am/are done was/were done will be done would be done is/am/are being done was/were being done have/has been done had been done Football is played in most countries in the world. The fish was caught by Mr. Green. Will the house be built next year? He knew he would be punished for drunk driving. Another bridge is being built over the river. This road was being built this time last year. No agreement has been reached so far by the two sides. When we got to the cinema, all the tickets had been sold out. . Are you familiar with these sounds? You have been slain. An ally has been slain. slay-- slayed -- slayed slay-- slew -- slain 击杀 现在完成时的被动语态 现在完成时 (have/has + v-ed)： 表示说话时已经完成的动作，而且这个动作的结果对现在仍有影响;或表示动作发生在过去，但一直持续到现在，并且有可能继续持续下去。 Present perfect passive 现在完成时的被动语态 被动语态 (be + v-ed) be随主语的人称、数和时态的变化而变化。当强调动作承受者，不必说出执行者或含糊不清的执行者时，多用被动语态。 Look at the sentences from the reading passage and answer the questions. a I guess you have been asked about the title of your book before. b New inventions like 3D printers have been used to make replacement hearts and bone parts. 1 What has happened to “you” in sentence (a)? Someone has asked “you” about the title of your book before. Look at the sentences from the reading passage and answer the questions. a I guess you have been asked about the title of your book before. b New inventions like 3D printers have been used to make replacement hearts and bone parts. 2 Who has used new inventions to make replacement hearts and bone parts in sentence (b)? People have used 3D printers to make replacement hearts and bone parts. a I guess you have been asked about the title of your book before. b New inventions like 3D pr