Unit9 现在完成时课件2023-2024学年人教版英语八年级下册

The present perfect tense 冬天来了，春天还会远吗？ If winter has already come, can spring be far behind? 现在完成时 知识链接：八年级下册Unit9 Have you read Treasure Island yet? 目录 现在完成时态的概念 现在完成时态的结构 现在完成时态的句式 现在完成时态与一般过去式的比较 现在完成时态练习 Tom is looking for his key to his bike. He can’t find it . So he called his mom and said: “I ______my key to my bike. He____it a short time ago and he still doesn't have it. He can’t ride his bike to go to school.He looks worried. lost have lost So he called his mom and said: “I _have lost_my key to my bike. 思考: 这里的“lost” 是过去式吗？ 不是！这里的lost 是过去分词 那have 又是什么？ 这里的have是助动词 我弄丢了自行车的钥匙，导致我不能骑车上学了（强调弄丢了钥匙之后对我的影响） = Tom his key to his bike. has lost Definition 1.过去某一时间点发生的动作对现在产生影响。 The present perfect tense I have lost my key to my bike. He has lost his key to his bike. 现在完成时 一.构成: have/ has + done (过去分词) 不同的动词有不同的过去分词 口诀：你规我就规，你不规我就不规！ 你：过去式 我：过去分词 过去式 过去分词 规则变化 （不仅规则，还跟过去式一模一样） 不规则变化 不规则变化 规则变化 回顾一下过去式的规则变化 例如：work-- dance--- stop-- try--- 思考以上四个单词的过去分词 不规则的形式一共分为四大类 AAA ABB ABA ABC cut-cut-cut have-had-had come-came-come do-did-done 按规律去记忆背诵！！！ How do we form the present perfect ? have / has + past participle A: I’ve looked at your resume. I see you work in a hotel. B: Yes, I do. A: How l have you had this job ? B: I’ve had this job for only a short time. But I have a lot of experience in the hotel business. In fact, my parents own a hotel in Mexico. A: How long have your parents owned a hotel? B: Most of their lives. A: Have you seen your parents recently ? B: Yes, I have. My mother has been to the U.S. a few times to see me. But my father has never been here because someone has to stay at the hotel all the time. He’s told me many times, “When you are an owner of a business ,you don’t have time for vacations. ” But I don’t want to be an owner now. I just want a job as a manager. Have you filled the position yet ? A: No, I have