1.They __________go anywhere they wished.

　　2.You __________go on those ships.

　　3.There __________be any other foreigners.

　　4.We just __________show our passports.

　　5.We __________see the sun setting behind the white pagoda.

　　1.Which verb is used as the past of must?

　　2.Which verb indicates an ability to do something?

　　3.Which verb makes a prediction about the future?

　　4.Which verb is used to give advice?

5.Which verb indicates the permission to do something? 　　They are easy for the students to answer.

　　Suggested answers:

　　1.could　2.shouldn't　3.won't　4.had to　5.could

　　1.had to　2.could　3.won't　4.shouldn't　5.could

　　 T:So much for this activity.I think you have got a good understanding of modal verbs.Let's do a further exercise.Please underline the correct verb in the following sentences.

　　(Show the following on the screen.)

　　1.You should/shouldn't visit the Three Gorges.They're beautiful.

　　2.Boats can/can't reach the upper part of the Yangtze River.It's too dangerous.

　　3.You should/shouldn't go in winter.The water's too low.

　　4.Travellers must/mustn't show their documents when they arrive.It's the law.

　　5.They could/couldn't see the mountains in the distance.The peaks were shining in the sunlight.

　　6.The children could/couldn't find their way out of the woods.They were lost.

7.Peter had to/must return by the end of February.He started work again in March. 　　This part is also easy to do.After two or three minutes' preparation,ask the students to say the words they choose individually.

　　Suggested answers:

　　1.should　2.can't　3.shouldn't　4.must　5.could　6.couldn't　7.had to

　　 Then pair the students to ask and answer questions based on the sentences in the activity above,that is,Activity 3.Have them take turns to ask and answer.Two minutes later,ask some pairs to do questions and answers for the whole class.

　　Step 3 Function

　　T:That's the end of grammar.After class,do more exercises to consolidate modal verbs.Now,look at Page 45.We'll talk about obligation,permission and prohibition.Do you have any idea of the way to show them?First,for obligation.Any volunteer?

　　Sa:We can use You must/should/ought to ...

　　T:Yes,good idea!We can also use sentence pattern,such as:It is necessary to/that...You are required to...As for permission,what kind of sentence do we learn?

　　Sb:You may or can...

　　T:Good suggestion!Besides,we can use You are allowed to...I think you are clever to say expressions for prohibition,right?

　　Ss:You can't/mustn't... and don't...

　　T:Good job!Now,let's see some examples in Activity 1.

　　(Show the following questions on the screen.)

　　Choose the correct meaning.

　　1.The captain lets passengers use his cabin.

　　(a)Passengers must use the captain's cabin.

　　(b)Passengers can use the captain's cabin.

　　(c)Passengers mustn't use the captain's cabin.

　　2.There are lectures-but you don't have to go to them.

　　(a)It is necessary to go to the lectures.

　　(b)It isn't necessary to go to the lectures.

　　(c)It isn't possible to go to the lectures.

　　3.Swimming form the boat is forbidden.

　　(a)You can swim from the boat.

　　(b)You must swim from the boat.

　　(c)You mustn't swim from the boat.

　　4.You're not allowed to smoke.

　　(a)It is against the rules to smoke.

　　(b)You can smoke if you wish.

　　(c)You don't have to smoke.

　　5.Passengers are required to take their passports with them.

　　(a)They can take their passports with them.

　　(b)They can't take their passports with them.

　　(c)They must take their passports with them.