Unit 3 Food and Culture Discover Useful Structures 课件-2023-2024学年高中英语人教版（2019）选择性必修第二册

Discover Useful Structure: 过去完成时态 Food and Culture Book 5 Unit 3 Contents 01 过去完成时定义 02 过去完成时结构 Food and Culture 03 过去完成时判定依据 04 过去完成时和其他时态区别 05 练习 01 过去完成时定义 Observe and discuss the followling sentences. B. By the time the policeman got to the shop, the thief had run away. A.Hong Kong had returned to China before Macao came back to China. Q:In sentence A, which action happened first, “return” or “came back”? Q:In sentence B, which action happened first, “got to” or “run”? present past future earlier past had returned came back had run got to Past perfect: had done The past perfect tense is used to tell an activity done before something in the past. So it is used in a background of past. Q1：什么是过去完成时？ By the time the policeman got to the shop, the thief had run away. 警察到商店时，小偷已经逃跑了。 过去 现在 将来 Q1：什么是过去完成时？ By the time the policeman got to the shop, the thief had run away. 警察到商店时，小偷已经逃跑了。 过去完成时是表示过去某个时间之前已经发生的动作或一直延续的动作或状态。→“过去的过去” 02 过去完成时结构 ① Tom had finished (finish) writing his novel ② I had eaten (eat) lots of cakes till then. 1. 肯定式： 主语+had+ done 2. 否定式： 主语+had + not +done ① Tom had not eaten his supper in the canteen before he went back home. 结构： ② When the police arrived, the thieves had not run (run) away. 3. 一般疑问式及肯否回答： ① Had you spent all of your money? Yes, I had./No, I hadn’t. Had + 主语 + done +其他？ Yes, 主语（人称代词）+had. No,主语（人称代词） +hadn’t. 4. 特殊疑问式： 疑问词 + had + 主语 + done+其他？ 疑问词 + 一般疑问句式？ ① Why had The Castle become a memory of generation? ② What had you bought? 肯定结构 had＋done 否定结构 had＋not＋done 一般疑问结构 had＋主语＋ done 特殊疑问结构 特殊疑问词＋had＋主语＋ done 总结：过去完成时的结构 ： 肯定结构 had＋been done 否定结构 had＋not＋been done 一般疑问结构 had＋主语＋been done 特殊疑问结构 特殊疑问词＋had＋主语＋been done 总结：过去完成时的被动语态结构 时态：过去完成时 语态：主动 结构：had done 动作：先发生 连接词 Reread the sentences again，paying attention to the use of the past perfect tense and the past perfect passive voice.(P29--1) 1. Th