section 6 Swam the good grammar

 6. Section 

6 modal verbs: introduction

can, must, should

must

You must be home by eleven.

Must you go?

mustn't and needn't

We mustn't wake the baby.

have to

Do you have to teach small children?

had to, will have to 

I didn't have to pay.

should 

What should I tell John?

can and could

He can play the piano.

She couldn't write.

may and might

It may snow.

I might have a cold.

must/can't: certainty 

She must be in.

He can't be hungry.

can and could: requests

Can you lend me a stamp?

can, could and may: permision

Can I use the phone?

shall in questions 

What shall we do?

had better 

You'd better take your umbrella.

would 

Would you like a drink?

I'd like to be taller.

used to 

I used to play the piano.

perfect modal verbs

I should have studied harder.

test yourself

modal verbs