2. Definition
We use modal verbs to show if we believe something is
certain, probable or possible (or not).
We also use modals to do things like talking about ability,
asking permission making requests and offers, and so on.
They are always followed by an infinitive without "to“.
Brittish Council.
3. Modal verbs
Must /Must not (Rule)
Have to / don’t have to (It’s necessary / Is not necessary)
Can / Can´t (Its’s allowed/not allowed)
Can / Could (Ask for permission informal/formal)
Shall Would May
Might Will Should
4. Obligation and Advice
We can use verbs such as 'must' or 'should' to say when
something is mandatory or forbidden.
For example:
Children must do their homework.
You must not eat in class.
Must I do the activity?
5. Necessity / OBLIGATION
We use Have to when we want to show something it
is necessary to do because is an obligation is as
mandatory as MUST:
You have to do your homework.
He does not have to break the rules.
Do you have to have a current drivers license?
6. Ability
• We use 'can' and 'could' to talk about something allowed or not
allowed or an ability to do something.
• She can speak six languages.
• My grandfather could play golf very well.
• Can /Could I have your phone number?
7. Permission
We can use verbs such as 'can’or 'could’ to ask for and give
permission. We also use modal verbs to say something is not
allowed.
For example:
Could I leave early today, please?
Can we swim in the lake?
8. Replaying about something
Positive Negative
Yes, of course. I’m afraid I can’t……
Yes, that’s fine. I´m sorry, but………...
Sure, no problem! I’d like to, but………..
