unit 4 topic 3 what do you know about mars 教案8（仁爱版九年级上）

1、 The main activities are 1a and 2a. 本课重点活动是1a和2a。. Teaching aims and demands 教学目标1. Master the new word:research2. Help the students to learn the usage of modal verb+passive voice.3. Talk about flying to Mars and the outer space and something about the aliens.4. Help students to learn expressing possibility and impossibility. Teaching aids 教具录音机/一个破损的MP3（或别的其他东西。）. Five-finger Teaching Plan 五指教学方案Step 1 Review 第一步 复习（时间：10分钟） （复习一般过去时的被动语态。）T: Good morning, boys and girls! (突然面色由晴转阴。)What happen

2、ed to my MP3? (可替换为其他的物品。)It was broken. （把破损的一面给大家看，面露心痛之色。）Who was my MP3 broken by? （转向全体同学。）Was it broken by you, S1? (对前排的一个同学提问。)（全班笑，然后开始猜测，教师引导学生用英语表述。）S2: Was it broken by yourself, Miss/Mr. ？T: No, but it is a good try.S3: Was it broken by your daughter?S4: Was it broken by?T: Exactly. It was broken by my dog.（板书）was/were + P.P.（教师板书划线部分，复习一般过去时被动语态结构。）（教师事先在教室里观察，并利用一些破损的部件问学生一些问题。）T：Was the desk broken by you, S5?S5: No, it wasnt.T: When was it broken? Was it broken yesterday?S5: No,

3、 it wasnt.T: Who was it broken by?S6: Sorry, I dont know.T: OK, no one knows who it was broken by.（指出其他破损的物品，如学生作业本、铅笔盒、钢笔等，要求学生仿照上面对话问答。） S7：Are these your books?S8：Yes, they are.S7：When were they broken?S8：They were broken yesterday.S7：Who were they broken by?S8：They were broken by .S7：Oh, pity.S8：Yeah. But I have them repaired already.T: OK. Good job. Boys and girls. English is spoken very well by you. Im proud of you.(因为场景明确，句型单一，大多学生能仿照句子，反应慢的学生靠单纯模仿来感悟，所以要及时鼓励，肯定他的进步，再推动他们进一步反思归纳语言结构。)（板书划

4、线部分，引导学生记忆、比较、归纳。）（板书）am / is / are + P.P.(为新课做铺垫。)T：Computers are used widely in every field. People search for information on the Internet. Scientists research on it too.（板书）research（用彩笔强调一下构词。重读句子，对比句子，让学生自己体会和猜测词意。）T: Scientists do experiment to research. So scientific research should be done carefully.（板书）scientificscientists（用彩笔强调一下构词，解释词性和词义变化的通常规律，领读生词。）Step 2 Presentation 第二步 呈现（时间：10分钟）1.（呈现重点词，为降低难度，先玩一个编故事的游戏。）T: Boys and girls. Lets have a game. Ill give you four words on the blackb

5、oard. You work in groups. Each group makes a sentence with one of the words. Lets see if we can form a story with five sentences.（板书）alien, planet, spaceship, humans culture（调动学生的思维也为中下层面的学生提供一个记忆单词的机会，成绩较好的学生也有机会充分发挥。）2.（呈现对话，让学生带着问题听录音。）T: Boys and girls. Well listen to the dialog and answer the questions:（板书）（1）What are they going to do this Saturday evening?（2）Is it a movie about alien?（3）What can people do on Mars in that movie?T: Boys and girls, can you answer the questions now?（学生回答完问题，再次

6、阅读1a,并注意关键信息。）(教师与学生核对答案，及时给予学生帮助并处理文中重难点。)（板书）We will be able to do anything that can be done on the earth.（定语从句）T: Pay attention to the sentence pattern and the words order.3.（情态动词的被动语态。）T：Look at the blackboard, here, this sentence. This part is modal verb passive voice. What can you find? How can we write modal verb passive voice? Compare with present passive and past simple passive.(让学生在对比中感悟语法规则，然后教师再指正归纳。)（板书）modal verb + be + P.P.T：Boys and girls, look at your books 1b. Find modal verb p

7、assive voice sentence.(指导学生独立完成1b，核对答案。)T：Now lets read the dialog 1a aloud together.Ss: Yes.T: Lets go through the dialog again. This time you should find out the key words with me.wonderful movie, life in space, excitingplanets like Mars, in space, what funStep 3 Consolidation 第三步 巩固（时间：8分钟）1.（让学生用以上列出的关键词复述对话并表演。）T: Boys and girls, can you act out the dialog?Ss: Yes. Lets try.T: Good job.2.（学生独立完成2c。）T: Here are some words. Can you make sentences with modal passive voice?（板书）do, see, send, cl

8、one, visitFor example: Humans may be cloned by scientists some day.T: S1, can you make a sentence with any words in the box？S1: Sure. Ships can be seen in the sea.S2: Spaceships can be sent into space.S3: Mars can be visited one day.(教师提醒学生注意过去分词的变化。)T: Boys and girls, look at 2c. Match the two columns to make sentences. Can you finish it by yourselves?Ss: Yes, we can.T: OK, one minute.（核对答案，指出学生错误，表扬做得好的。）Check the answers with the students.Step 4 Practice 第四步 练习 （时间：10分钟）1.（学习2a对话。）T：Listen to

9、 the tape and answer the questions.（板书）（1）How many people are there in the dialog?（2）What are they talking about?（3）What does the American scientist think about aliens?T: Can anybody answer them now?Ss: Yes.T: S1, please!S1: （核对答案）（板书）He thinks they are reading on the Internet in order to learn about humans culture.(领读生词，解释词形变化。）T: Boys and girls, read after me.T: Can you make sentences with “in order to”?Ss: Yes.T: S2, please!S2: We study hard in order to work for our country.T: Good! Anyone else? S3, please!S3: OK, aliens surf the Net in order to learn about humans culture.S4: （解释对话中的难点。）（板书）I dont think aliens can be

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