情态动词 导学案

情态动词导学案

Teaching aims:

Complete the basic understanding of the modal verb (can/ could/ may/ might/ will/ shall/ should/ must); students are able to master the function of “modal verbs+have done”

Step1 Attention-raising input tasks:

Material 1:

M=Mum, S=Sara, P=Peter

(When Sara came home from work, she found her mother in an anxious state.)

S: What is wrong, Mum? You seem upset.

M: It is your younger sister Jill. She should have been here an hour ago.

S: Don’t worry, Mum! It is not all that late and she may not realize how late it is. I think she must be here soon.

(Just then Sara’s brother Peter came into the kitchen.)

P: What is up? Mum is on the phone and she seems as though she is going to cry.

S: It is Jill. She should have reached home by now and Mum’s getting anxious.

P: You need not feel so anxious Mum! You know what teenager girls are like. I am sure she can’t be in danger.

M: I can’t help but be concerned. I have just rung Lucy and she said Jill left her outside the cinema ages ago to get the bus home. I think she must have trouble. If she is safe, she can’t stay outsides so long.

P: Well, the bus service is not very frequent in the evenings. She may have missed one and is waiting for another. Have you tried phoning her on her mobile?

M: Yes, but there is no reply. That made me even more worried. I think something must have happened to Jill.

Do you think we should call the police?

S: Calm down, Mum! You may make yourself ill. She may have switched her mobile phone off in the cinema and forgotten to switch it back again. Or it may need to be charged.

(Later, the phone rang.)

M: Oh, my Jill! Where are you? Why not answer my phone?

J: Mum. My phone is missing. I think you must worry about me, so I lend the phone.

M: Come back, it is too late. It may be left in the cinema.

J: No, it can’t have been left in the cinema. I have gone and asked.…

Material 2

1.If you won’t stop smoking, you can only expect to have a bad cough.

2.Water will boil at 100℃. It won’t boil at under 100℃.

3.Harriet will keep leaving her things all over the floor.

1.Accidents can happen at any time.

2.How can you be so careless?

1.May I ask for a photo of your baby?

2.May you be happy.

1.A: Mom, can I have a word with you?

B: OK, if you must.

1.I did not expect he should behave like that.

2.You should not have told her the news. She is crying now.

Read material 1 and fill in the following blanks

When Sara came back, she found Mum was in an anxious state. It turned out that Jill, the teenager sister, _____________home an hour ago. Sara comforted Mum that Jill _____________how late it is and _____________home soon. Peter also comforted Mum that she _____________ so worried and believed Jill _____________danger. Mum told them Jill’s friend Lucy and Jill went to the cinema and left there for a long time. She thought Jill _____________. If Jill was safe, she _____________outsides for that long. Peter guessed Jill ____________ the bus and was waiting for another. Peter suggested Mum made a phone call to Jill. Mum said Jill did not reply. Mum guessed something _____________to Jill. Sara told Mum to calm down and worried Mum _____________ herself ill. And Sara guess Jill _____________the phone in the cinema and forgotten to switch it back again or the phone _____________ to be charged. Later, Jill called and explained her phone was missing. She thought Mum _____________ about her and lent a phone to make the phone call. Mum thought the phone _____________ in the cinema and suggested they found it the next day. But Jill said it _____________ there because she had searched there.

Read Material 2 and work out the meaning of the elicited part:

Step2 explicit instruction of modal verbs

couldn’t/can’t do/h ave done

must do/have done to express guessing mood

may/might do/have done

“should have done” to express blame

Step3 Grammaticality Judgment Task

1.It might have given a serious shock to Mother, for her face suddenly turned as white as a sheet.

2.A: I think the man over there must be Bob.

a)B: It may be him. He has gone to Australia.

3.She can’t be here. I saw her come in.

4.A: Who’s singing in the next room?

a)B: It must be her. She has gone to New York.

5.A: Where’s Jeff?

a)B: I’m not sure. He can be playing football on the playground.

6.---- Can this book be yours?

---- No, it can be mine. It must be his.

7.They should have missed the plane, or perhaps they have been prevented from coming for some reason.