Unit 8 Section A (4a-4c) 课件 2022-2023学年人教版英语八年级下册

初中英语人教版八年级下 Unit8 Have you read Treasure Island yet? Section A（Grammar Focus-4c） 1.掌握现在完成时的用法。 2.掌握already和yet在现在完成时中的用法区别。 3.能正确运用现在完成时来描述已发生的事件。 Robinson Crusoe 《鲁滨逊漂流记》 Warm-up Have you read Little Women yet? Yes, I have./No, I haven't. Has Tina read Treasure Island yet? Yes, she has. She thinks it's fantastic. Have you decided which book to write about yet? Yes, I have. I've already finished reading it. It was really good. Grammar Focus 肯定式 主语+助动词have/has+动词的过去分词“.” 否定式 主语+助动词have/has+not+动词的过去分词“.” 疑问式 助动词have/has+主语+动词的过去分词“？” The basic sentence patterns 5 A: Have you surfed the Internet (上网)? B: Yes, I have. I have surfed the Internet. No, I haven’t. I haven’t surfed the Internet. The basic sentence patterns past now Yesterday , we cleaned the classroom. Now , the classroom is clean because we have cleaned it. 用法1 表示过去发生的动作对现在产生的结果或影响 The usages of the present perfect tense 7 now past I began to teach English at this school five years ago. I have taught English at this school for five years. 用法2： 表示过去发生的动作一直延续到现在且有可能继续下去的动作或状态。 The usages of the present perfect tense 8 用法1 表示过去发生的动作对现在产生的结果或影响 用法2 表示过去发生的动作一直延续到现在且有可能继续下去的动作或状态。 already, yet ever , never , just ,before since VS for Adverbial clauses of the present perfect tense 9 通常用于肯定句中，放在have / has和过去分词之间，意为“已经”。如: They have already arrived at the hospital. 他们已经到达医院了。 already yet 多用于否定句和疑问句末, 意为"还(没)"。如: The sun has not risen yet. 太阳还没有升起。 Adverbial clauses of the present perfect tense 10 01 ever 02 never 03 just 04 before “曾经”，通常用于疑问句中。 Have you ever been to the USA ? “以前”，用在完成时中，放在句末。 Ｉhave never read this kind of books before. “从来不”，用在否定句中。 Is he famous ?I have never heard of him. “刚刚 ”，用在陈述句中。 I have just bought a novel。 Adverbial clauses of the present perfect tense 11 4a Use the words in brackets to complete the conversations. 1. A: Would you like something to drink? B: No, thanks. ______________________. (just/ drink some tea) 2. A: I