Unit 3 Food and Culture Learning about language语法课件-2022-2023学年高中英语人教版（2019）选择性必修第二册

Unit 3 Food and Culture Discovering useful structures 过去完成时 Book V Learning aims 1.To learn about past perfect tense 2.To tell the difference between past tense and past perfect tense 3.To learn to use past perfect tense to express Lead in How long have you learnt English? I have learnt English for about 8 years. She has studied English since 2015. Before Mr. Song started to teach me, I had learned English for 7 years. 1.过去完成时基本构成:had+ved(过去分词) 现在完成时基本构成:have/has+ved(过去分词) Let’s discover 1.By 2022, I had been to Shangmei Middle School. 2.Before I went to Shangmei I had studied in No. 2 Middle School. 3.By the time I went to Shangmei, I hadn’t known anything about it. 4.Had your brother graduated from Shangmei when you went to study there? 5.Where had you studied up till then? 2.过去完成时提示词: before(连词/介词) + 过去的时间点 “在...之前” by +过去的时间点 “到...为止” by the end of +过去的时间点 “到...为止” by the time +(一般过去时) “到...为止” up till then 1.By 2022, I had been to Shangmei Middle School. 2.Before I went to Shangmei I had studied in No. 2 Middle School. 3.By the time I went to Shangmei, I hadn’t known anything about it. 4.Had your brother graduated from Shangmei when you went to study there? 5.Where had you studied up till then? 3.过去完成时句式结构: ①肯定句:主语+had+ved+其他 ②否定句:主语+hadn’t+ved+其他 ③一般疑问句:Had+主语+ved+其他 ④特殊疑问句:Wh-+had+主语+ved+其他 4.过去完成时被动如何构成? 1.By yesterday, 118 people had been killed in the earthquake in Gansu. 2.How many people had been saved before the rescue team came? 3.By the time the earthquake happened, Jishishan county hadn’t been known to us. 4.Had the house been destroyed when you heard the news? ①肯定句:主语+had+been+ved+其他 ②否定句:主语+hadn’t+been+ved+其他 ③一般疑问句:Had+主语+been+ved+其他 ④特殊疑问句:Wh-+had+主语+been+ved+其他 4.过去完成时被动如何构成? Practise 1.She _(finish) reading the book up till then. 2.They _(learn) more than 100 Chinese words by the end of last month. 3.1000 trees _(plant) before last Friday. 4.When he arrived at school, his parents_(leave) . 5. General Tso’s chicken _(change) by the time I exper