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7b Unit 5 Grammar教案

教学目标1、学习can 与could在表示能力的使用

2、学习can 与could 在表示可能性时的应用

重难点分析教会学生如何理解运用区别can could

学情分析学生已经掌握一些关于情态动词的用法，但如何正确区别一些情态动词，学生还是不太明确

教学方法情景教学法,归纳法

教具准备课件

教学步骤教师活动学生活动个性化补充

Step 1. Warming up.

1) Make a survey.

“What can you do now?”

Ask:

Can you ride a bike / swim / fly a kite / play football / play chess?

Yes , I can. / No, I can’t.

2)Show the students the following phrases on the screen.

Ride a bike

Swim

Fly a kite

Play football

Play chess

3)Ask the other students in the class.

Can she / he …?

4)Show the students the sample on the screen

eg: A. Can he ride a bike?

No,He can’t / Yes, can

Step 2. Presentation.

1) Ask student again:

Could you ride a bike five years ago ?

(Help them answer:

Yes, I could./ No, I couldn’t.)

2) Get the students to ask the teacher about the past of A and B.

Could he / she …? (Yes, he / she could. / No, he / she couldn’t.)

3) Teach the students to say the whole sentences:

She could ride a bike five years ago.

He couldn’t swim five years ago.

……

5) Work out the rule.

① Positive: can

could

② Negative: can’t

Couldn’t

③Question: Can …?

Could …?

Step 3. Practice.

1) Work alone.(Part A1)

2)Get the students to report themselves like above.

eg. Can Sandyrow a boat now?

Could he do it last year?

3)Complete the conversation of Part A2.

5) Explain:

We can use am (is , are) able to replace can and was (were) able to replace could.

eg.①Mike can sing more than 20 English songs.

Mike is able to …

②She could speak English when she was four.

She was able to…

Step 4.ask

1) ask student

Can I borrow your pen ?

Can I open the window ?

Can I close the door?

……

Could I borrow your pen ?

Could I open the window ?

Could I close the door?

……

2)比较can,may,could 表示可能性的用法

Step 5. Guessing a riddle.

It can live in water. It can breathe under water. It can swim. It can live in a glass bowl. People can feed and watch them every day. What is it?

(A goldfish)

Step 6. Presentation.

1.Say:

①Zhang Hua works hard. It is possible for him to pass the exam.

(He can pass the exam)

② Nick didn’t bring a football to school.

It is not possible for us to play football after class.

(We can’t play football after class.)

③It was sunny last Sunday. It was possible for the children to go to the park.(The children could go to the park)

④Millie had no money yesterday. It was not possible for her to buy that coat.

(She couldn’t buy that coat.)

2.Show the sentences above on the screen and explain them to the students:

We use “can” / “could” to say that something is / was possible to happen.

3. Get the students to explain with “possible”.

①Fire can be dangerous if we are not careful.

②Mr. Sun can’t be at home because I saw him at school just now.

③I didn’t lose my key so I could get in.

④Mr. Sun could not get out because he hurt his leg.

利用一些学生熟悉的短语，以can为提问方式与学生进行问答

用第三人称换第二人称进行对话练习

Write them down on the blackboard.

Write the sentences down on the blackboard

Ask the students to compare the sentences with can and could.

Ask them to draw the conclusion.

巡视，帮助可能有困难的学生

Check the answer

Can和could分别表示现在和过去的能力我们在上册书中还学过表示征求意见的can, may

Write them down on the blackboard

Write them down on the blackboard

也可以用学生的课堂状况作为语境

Show the sentences above on the screen

Use “can” to ask

小组内分组练习

Ask the partner more questions like above and write down their answers , then report to the class.

answer

让学生在组内写出更多的类似的句子

总结can 与could的区别

report themselves Talk about the tables freely. in pairs.

理解

举例说明

Answer these sentences and make more

完成单选练习

Guess

总结

作业设计补充习题

同步导学

板书设计He can’t / cannot swim.…

She could ride a bike five years ago.

He couldn’t swim five years ago.

Can I borrow your pen ?

Can I open the window ?

Can I close the door?

……

Could I borrow your pen ?

Could I open the window ?

Could I close the door?

He can pass the exam

We can’t play football after class.

The children could go to the park

She couldn’t buy that coat.

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