高一英语必修二Unit3语法课件.pptVIP

Unit 3 Computers;Two Tasks: The Present Perfect Tense The Present Perfect Passive Voice;The Present Perfect Tense;The Present Perfect Tense;I bought a new car two weeks ago .;构成： ;The Present Perfect Tense;work ;不规则动词： 不规则动词的过去分词要特别牢记，详见课后附录中的不规则动词表。 ;The Present Perfect Tense;I came here eight years ago . ;表示过去已经开始，持续到现在的动作或状态，可以和表示从过去某一时刻延续到现在（包括“现在”在内）的一段时间的状语连用。 ;连用的时间状语： ;The Present Perfect Passive Voice;一、现在完成时的被动语态构成：have/has been + 动词的过去分词表示到现在为止已经完成的某个被动的动作。例如：;;二、现在完成时的被动语态主要用 于以下情况：;2. 说话时已完成的动作或出现的结果。 The door has been locked. 门已经被锁上了。 （我或别人现在进不去） 3. 动作或状态始于过去, 持续到现在, 并可能持续下去。如： He has been told about it for many times. 有人告诉他这事很多次了。 （可能还会有人告诉他）;4. 用在时间和条件状语从句中, 表示 将来某时已完成的动作。如： We’ll start as soon as the work has been finished. 工作一完成我们就立即动身。 ;三、句式转化：;3.现在完成时被动语态一般疑问句 ?Have/Has+主语+been?+?done?+...?? Has?a?new?computer?been?bought??一台新电脑已经被买了吗？ 4.现在完成时态被动语态的特殊疑问句? 疑问词+have/has+been+done+…？? Ten?computers?have?been?bought?by?the?company. By?whom?have?ten?computers?been?bought？;The Present Perfect Passive Voice;Exercises 1. Both my brother work at the power station that ___ in my hometown. A. has set up B. has been set up C. was set up D. is set up 2. ----_____ the sports meet will be put off. A. I’ve been told B. I’ve told C. I’m told D. I told 3. All the preparation for the task ____, and we’re ready to start. A. completed B. complete C. had been completed D. have been done 4. ---- How long ____ at this job? ---- Since 1990. A. were you employed B. have you been employed C. had you been employed D. will you be employed;5. When and where to go for the on-salary holiday ____  yet. A. are not decided B. have not been decided C. is not being decided D. has not been decided;8. The windows _____,you need n