Модальные глаголы презентация

Modal Verbs

To know…

To learn…

Modal verbs

Must
Have to
Ought to
Need to
Should
Can/ could
May/might

Main meanings

Must – obligation imposed by the speaker / logical assumption
Have to – obligation imposed by a situation (external obligation)
Ought to – moral obligation denoting a duty, advice or a reasonable action

Need to – necessity
Should – suggestion, advice
Can – possibility
- ability
- permission
Could – past possibility, ability
- asking for permission
May – request
- permission
Might – possibility (higher degree of doubt)
- polite suggestion

You could talk to your parents about whether or you should marry her.
You might consider taking up meditation to help you sleep better.
Shouldn't we have a pizza instead? 
What should I do today?

Suggestion

You should brush your teeth twice a day.
We could meet for dinner at the weekend. (less strong)
We ought to take a taxi, it’s too far to walk.
You had better study for the exam tomorrow.

Offer

Shall we dance?
Would you like to join my friends and I tonight?

Ability

I can dance and sing.
I can’t pilot a ship.
I am unable to find the schedule for today.
I knew I was able to win before we started playing.

Possibility

Smoking can cause cancer.
John could be fired for stealing.
I may see you tomorrow before you leave.
I might go swimming after work today. (less probable)

Permission

Can I wear my sunglasses in my work uniform today?
May I please have a glass of water?
May is formal, more polite and better to use.

Obligation

You must be at work tomorrow before 8:00.
You mustn’t be late.
I have to go to see the Doctor in the morning.

You don’t have to clean your room today.
You needn't water the garden this evening. It's going to rain tonight.
Needn’t is less common.

He must live near here because he comes to work on foot.
You’re going to China? That should be interesting. (less certain)
It can’t be a burglar. All the doors and windows are locked. 

You can’t park here, sir.
You can wear jeans but you can’t wear trainers in that bar.
You mustn’t speak when the teacher is speaking.
You may not have dessert until you finish your dinner.

Can / Could / Will / Would help me the bags? help me with the bags, please?

Have to (obligation)/don’t have to (lack of obligation)
Must (obligation)/mustn’t (prohibition)
Need to (necessity)/don’t need to (lack of necessity)
Can (possibility)/can’t (impossibility/ logical assumption)

Ex.1a p.68