外研版（2019）高中英语必修第三册 Unit3 单元语法详解课件.pptxVIP

Unit 3 The world of science 单元语法详解外研版新教材必修三 本单元引入一个新的重要语法内容——现在完成时的被动语态这一内容同样也是高考的重点和热点，请看教材原句 ◆原句再现1. I guess you have been asked about the title of your book before.2. New inventions like 3D printers have been used to make replacement hearts and bone parts.3. Nothing like this has been invented yet…4. In addition, important advances have been made in ….5. I’ve also been told that you are an inventor yourself…6. …The new Age of Invention has just been published. 1. My watch has just been repaired.2. The weather has been cold this winter so far.3.These damaged buildings have already been rebuilt recently.4. All the children have already been taken care of in the village.5. She has been taken to the hospital.6. They have been admitted into the key university.◆ 现在完成时被动语态的四种句式：肯定式; 否定式; 一般疑问式; 特殊疑问式◆ 现在完成时被动语态的基本结构：have/has been done.句子主语为复数时，使用have been done; 句子主语为单数时，使用has been done. 请观察以下句子 ※ 肯定式:主语 +have/has +been+及物动词的过去分词+其他※ 否定式:主语 +have/has + not + been + 及物动词的过去分词+其他.※ 一般疑问式: Have/Has+主语+been+及物动词的过去分词+其他※ 特殊疑问式:特殊疑问词(组)+have/has+主语+been+及物动词的过去分词+其他请观察以下句子1.This book has already been translated into French.2. We haven’t been told the date of the meeting so far.3. Has the machine been repaired yet?4. How many years has the computer used till now?5. How have these problems been solved? ◆ 现在完成时被动语态的含义※ 动作已完成，强调对现在造成的影响或结果※ 主语和谓语动词之间为被动关系请观察以下句子a. Your room has been cleaned, so you needn’t clean it now.(clean 动作已经完成, 而且 room 与 clean 之间为被动关系)b. These vegetables have been watered, so we can go home.(water动作已经完成, 而且 vegetables 与 water 之间为被动关系)c. The problem has just been solved by our teacher. (solve动作已经完成, 而且 problem 与 solve之间为被动关系)d. All the rice in the bowl has been eaten up.(eat动作已经完成, 而且 rice 与 eat之间为被动关系) ◆?现在完成时的被动语态的主要用法●表示过去一个被动的动作或状态,一直持续到现在,并有可能持续下去,常与 for, over, in the past … years或 since引导的时间状语连用,或常见于“How long....?”句型中。请观察以下句子a. The film has been shown for almost three hours.b. The car has been used in the past twelve years.(比较：The car was used in the p