九年级英语下册Unit 1 教案

　　 Unit 1 You must stir it gently

　　 目标:复习情态动词的用法,会使用情态动词表达规则

　　 重点:情态动词

　　 难点:情态动词的使用

　　 步骤

　　 Stept1 Lead--in

　　 T Show a coin and say :This is a coin.What can we use it to do ?

　　 S: To buy somethings......

　　 T:Yes ,but today we use it to do an experiment .

　　 (show the soap and liquid soap) What are these?

　　 S:(引导学生回答,学习生词)

　　 A bar of soap and some liquid soap

　　 T :What do we use soap or liquid soap to do ?

　　 S:(各种各样的答案)

　　 T:But today,we are going to use them to do an experiment.

　　 On the blackboard:

　　 eyedropper 、coin 、glass of water 、 liquid soap

　　 (ask the students to read the words and feel this things)

　　 Step 2

　　 T: Show the coin and say : This is the surface of the coin.

　　 Show the eyedropper and say: This is a eyedropper.

　　 Now let's fill it.

　　 用滴管滴水: This is a drop of water.

　　 Count the drops of water

　　 Do the experiment

　　 Step 3

　　 Ask some students to come to the blackboard to do this experiment,after that and ask them to answer there questions:

　　 Q1: How many drops of water can you fill onto the surface of the coin?

　　 Q2: How many soapy drops of can you fill onto the surface of the coin?

　　 Q3: Why would we fit more soapy drops onto the coin?

　　 Step4

　　 Listen and read .Then say.

　　 Listen to the tape and find out the results of ZhangHai's experiment.

　　 Step5

　　 Read and practise the dialogue in groups.Then ask some groups to act it out.

　　 Step6

　　 Explain the language points

　　 Step7

　　 情态动词用法小结

　　 情态动词是一种本身有一定词义,表示说话人的情绪、态度或语气的动词,但不能单独做谓语,只能和其他动词原形一起构成谓语。

　　 情态动词的数量不多,但用途广泛,主要有下列几个:

　　 can (could), may(might), must , need, ought to, shall(should), will(would)。

　　 can (could) 表示说话人"能,可以,同意,准许"以及客观条件许可。Could 为can 的过去式。例如:

　　 Can you pass me the book? 你能把书递给我吗?

　　 Could you help me ,please? 请问,你能帮助我吗?

　　 What can you do ? 你能干点什么呢?

　　 Can you be sure ?你有把握吗?

　　 can 和could 只能用于现在时和过去时两种时态,将来时态用be able to 来表示。

　　 He could help us at all. 他完全可以帮助我们。

　　 With the teacher's help,I shall be able to speak English correctly.

　　 有了老师的帮助,我将能准确地讲英语。

　　 may(might)意为 "可以"。表示说话人同意、许可或请求对方许可。例如:

　　 You may take the book home. 你可以把书带回家。

　　 May I come in ? 我可以进来吗?

　　 may的否定式为may not,缩写形式是mayn't.

　　 might 是may 的过去式,有两种用法:一种表示过去;另一种表示虚拟语气,使语气更加委婉、客气或对可能性的怀疑。例如:

　　 He told me he might be here on time .他说他能按时来。

　　 Might I borrow some money now? 我现在可以借点钱吗?

　　 must 表示"必须、应该、一定、准是"。表示说话人认为有必要做某事,命令、要求别人做某事以及对某物的推测。

　　 must 用于一般现在时和一般将来时,过去时可以用?Have to 的过去式代替。例如:

　　 He must be the man I'm looking for. 他一定是我要找的人。

　　 He had to go because of somebody's calling him that day.那天他要走是因为有人叫他。

　　 Must 和have to的区别:

　　 Must 表示说话人的主观思想;have to 表示客观需要。例如:

　　 You must do it now.你必须现在就做。(说话人认为现在必须做)

　　 I have to go now.我得走了。(客观条件现在必须走)

　　 need 表示"需要"。多用在否定式或疑问句中。例如:

　　 Need I attend the meeting tomorrow?明天我需要参加会议吗?

　　 Need是一个情态动词,它的用法和其他的情态动词的用法完全一样,但是need 还可以当做实意动词使用,这时need就像其他动词一样,有第三人称、单复数、后面带to 的动词不定式等。例如:

　　 Do you need a dictionary?你需要词典吗?

　　 She needs a necklace. 她需要一条项链。

　　 ought to 表示"应当,应该"。后面跟带to的动词不定式。

　　 You ought to bring the child here.你应该把孩子带来。

　　 shall ,should 表示"命令、警告、允诺、征求、劝告、建议、惊奇"例如:

　　 You should be no problem.这应该没问题。

　　 Shall we go now? 我们现在可以走了吗?

　　 Step8

　　 Retell the experiment.

　　 Take the eyedropper Fill it with water squeeze drops Not to spill water over Count the drops

　　 Step9 Work in pairs

　　 1. Ask each groups to think about their lab rules,and then take example write on the books.

　　 2.Ask some students to say out their results.

　　 3.Change the phrases into sentences

　　 Step7 Listen and order.

　　 Ask the students to look at the pictures carefully.

　　 Listen the first time and order

　　 Check the answer by listening the second or the third time.

　　 Step8 Listen and complete

　　 1.Listen again and finish the exercise

　　 2.Check the answer together.

　　 Step9 Homework