Unit 3 Food and Culture Discovering Useful Structures 课件 2022-2023学年高中英语人教版选择性必修第二册

Food and culture Unit 3 1 Learning about language past perfect tense past perfect passive voice 过去完成时 VS 过去完成时的被动语态 2 1 过去完成时的定义 3 01 Observe and discuss the followling sentences. 01. I returned the book. 02. I had borrowed the book from the library. 一般过去时陈述过去的某件事情。 过去完成时 had done I returned the book that I had borrowed from the library. 我把从图书馆借的书还回去了。 I returned the book that I had borrowed from the library. 我把从图书馆借的书还回去了。 01 now 过去 过去完成 had borrowed returned 先发生 后发生 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。 2 过去完成时的结构 6 定义： 过去完成时表示在过去某一时间或动作之前已经发生或完成了的动作，即“过去的过去”。 过去 过去的过去 现在 基本结构： (1)肯定：主语＋had (been) done (2)否定：主语＋had not (been) done (3)疑问：Had＋主语＋(been) done 疑问词＋had＋主语＋(been) done 7 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. ② When the police arrived, the thieves had not run (run) away. 【即学即练】 用括号内动词的正确形式补全句子。 1. They （arrive) at the station before the train left. 2. We （reach）the top of the hill before midnight. 3. I had been at the bus stop for 20 minutes when a bus finally (come). had arrived had reached came 3 过去完成时的被动语态 10 过去完成时的被动语态 结构： had + been +及物动词的过去分词 e.g. The injured passengers had been sent to hospital before the reporters arrived at the spot. 1．过去完成时的被动语态有以下三种形式 (1)肯定结构：主语＋ had been done ＋其他成分。 (2)否定结构：主语＋ had not been done ＋其他成分。 (3)疑问句结构：had ＋主语＋ been done ＋其他成分？ 疑问词＋ had ＋主语＋ been done ＋其他成分？ 12 过去完成时被动语态与现在完成时被动语态用法区别：现在完成时被动语态表示相对于现在来说已被完成的动作，过去完成时被动语态表示相对于过去某一时刻来说已被完成的动作。 例如：This polluted river has been cleaned. 这条被污染了的河流已被净化。 析：该句表示到现在为止这条河流已被净化。 例如：He said this book had been translated into Japanese. 他说这本书已被译成日语。 析：该句表示到他说话时所体现的时间为止这本书已被译成日语。 总结 13 【语境应用】完成句子。 1) The tickets ____________ (sell) out before I came to th