Unit 2 Saving the Earth-Topic 1 Pollution has caused too many problems.-Section A-ppt课件-(含教案+视频+音频)-市级公开课-仁爱科普版九年级上册(编号：c2e63).zip

Unit 2 Saving the Earths Section A I I.Teaching aims 1.Knowledge aims： 掌握本课的重点词汇和短语，巩固一般过去时和现在完成时的用法 和区别。 能够用一般过去时和现在完成时描述过去和现在的变化。 正确使用 there be sth./sb. doing sth.来表达“有某人/物正在做某事”。 2.Skill aims: 能听懂描述环境变化的对话，区别一般过去时和现在完成时的用法。 能理解和运用一般过去时和现在完成时来进行听、说、读、写活动。 3.Emotional aims: (optional) 让学生了解环境污染的严重性，并树立环保意识。 II. The key points and difficult points 1. Key points: Words and phrases: bee, butterfly, mess, shame, several, pollute, waste, villager, destroy, , goodness, pour, see sb. doing sth. pour sth. into sth. cut down, my goodness; have/has gone Sentences: What a shame! / What a mess! The flowers and grass have gone! What has happened here? There be sth./sb. doing sth. There are several factories pouring waste water into the stream. Everything has changed. Grammar: differences between Simple Past and Present Perfect tense. 2. Difficult points： 正确使用 there be sth./sb. doing sth.来表达“有某人/物正在做某事” 。 能正确地区别使用一般过去时和现在完成时。 . Teaching aids 图片（关于环境变化对比图或者影像资料） ，录音机，幻灯片等。 . Teaching procedures 1. Greetings and Read new words of Section A together 2. Lead- in Watch a MV of Michael Jacksons song. T: first, lets watch a MV of Michael Jacksons song, while you are listening to this song, you should think about this question: how was the earth in the past? what has happened to the earth? Read the title of todays lesson. (explain the new words- pollution) 3. Pre-listening Step 1: Read the title of todays lesson. (explain the new words- pollution) Step 2: Look at the picture of the West Hill in the past. Answer the question :what can you see in the picture? Step 3: Look at the picture of the West Hill now. answer the question: what has happened to the West Hill now? Do you think they still want to have a picnic here? 4. While-listening Step 1: look at 1b, explain the requires of 1b. read these words together. Step 2: listen to 1a for the first time. Step 3:listen to 1a again. Step 4: check answers. 5. Post- listening Step 1:watch a short video of 1a to understand the context. Step 2: read after the tape. Step 3: work in pairs and read 1a , then ask two groups of students to come to the blackboard to read 1a. Step 4: Explain the important points of 1a. There besb./sth. doing sth.; pourinto Step 5: give students 3mins to retell 1a by using the words in 1b. Step 6: finish 1c and check the answers 6. Summarize Summarize the important words, phrases and sentences in 1a. 7. Homework 1. Read 1a. 2. Write a passage according to Part 4. 3. Finish Section A in your workbook. 4. Preview Section B. 8. blackboard design Unit2 Topic1 Section A there be sb./sth doing sth cut down have gone pour sth into sth chemical factories pollute