Unit 1 Past and present Grammar 设计说明 首先通过观看一段电影的剪辑视频，引出现在完成时，然后呈现现在完成时的三个概念以及与之连用的时间状语，并通过一些练习进行巩固。再对完成时态中just, never, already, yet, ever, since和for的用法加以讲解和区分。最后对规则动词的过去分词变化规律进行分类讲解，同时对不规则动词的变化规律也进行讲解，进而通过练习来巩固。 教学目标 通过本课节的教学，让学生达成以下目标： 1.知识目标 掌握词汇：yet, recently, past 2.能力目标 (1)掌握现在完成时的基本结构、基本用法和动词过去分词的变化规律；能够在语境中正确运用现在完成时； (2)理解并运用常和现在完成时连用的时间表达方式。 3.情感目标 了解城市变迁，培养学生热爱生活、感恩社会的情感。 重点难点 1.重点：现在完成时的基本结构、用法和动词的过去分词变化规则。 2.难点：能够在语境中正确运用现在完成时。 教学准备 PPT 课件；相关图片。 授课时数 1课时 教学过程 Step 1 Lead-in Watch a video and pay attention to what they said. Then show the sentences about the present perfect tense in the video on the screen. 1. I’ve lived here since I was born. 2. Have you ever moved house 3. …and we’ve lived in this area since then. 4. Has the town changed a lot over the years 5. Now the government has turned part of the town centre into a new park. 6. However, most of my old friends have moved away. 7. It has become impossible for us to see each other as often as before. Ask: What can you find out They are the sentences with “have/has+done”. Step 2 Presentation Ⅰ. More examples. Say: Can you find more sentences with“have/has+ done”in “Welcome to the unit” Then give students one minute to find more sentences. I’ve just eaten it. You’ve changed too. You’ve eaten my food. Ⅱ. Analysis. 1. We use the present perfect tense to talk about actions that started in the past and continue to the present. 表示从过去开始，一直持续到现在的动作。 (1)常用的时间状语有： ①for+一段时间：如for three years, for a long time… I have known you for a long time. 我认识你很长时间了。 ②since+过去的时间点/动作：since last year, since I came here… I have not seen him since we met last week. 自从我们上周见过面，我就没有见过他。 (2)“for+时间段”可与“since+时间点”转换。 Translate some sentences. ①我认识李雷三年了。 I’ve known Li Lei for three years. =I’ve known Li Lei since three years ago. ②我已经学了10多年的英语。 I have learned English for over ten years. 2. We use the present perfect tense to talk about actions that happened in the past and have a connection with the present. 表示过去发生或已完成的动作对现在造成的影响或结果。 I have just opened the door.我刚刚开了门。 (The door is not closed now.) Jack has already finished his homework. 杰克已经完成了他的家庭作业。 (Jack is free now.) Practice: Choose the correct answers. ①Look at my bowl. Who _____ my dumplings That’s too bad! A. ate B. has eaten ②Jack _____ home. Don’t worry. A. arrived B. has just arrived ③I _____ the key to the door, so I have to wait till Mum comes back. A. have lost B. lose Answers: BBA 常用的时间状语有： (1) already“已经”，放在肯定句句中 ... ...
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