Modal verbs are auxiliary verbs, also called
helping verbs, like can, will, could, shall, must,
would, might, and should. After a modal verb,
the root form of a verb is generally used.
Ability
We use can, be able to and could to
show that someone has (or doesn’t
have) an ability to do something.
(subject + modal + verb base form + C)
Modal auxiliary + subject + main verb + ... ?
Examples
Ana can sing like madonna.
Can she play guitar?
CAMILA FREIRE 3 BGU B
Permission
We use may, could
and can to ask for
and give permission.
modals verbs + subject + verb + complement + ?
Could I borrow your dictionary?
Request
We can use the verbs ‘can‘
‘could‘ and 'would' to ask for
something.
Can/Could + Subject + Verb+ C + ?
Can you pass the salt please?
Can is less polite than Could.
Would you mind + Verb + ING + C + ?
Would you mind closing the door?
Offers and suggestions
We use the modals of
suggestion could and might
to give someone ideas about
possible plans or actions.
Subject + could/might + verb + complement
We could ask her to join us or we could go alone.
We only use might not
(not could not) in
negative suggestions.
You might not want to leave when is raining.
Obligation
They are must, have to, should and ought to.
we Use ‘must’ and ‘have to’ to express a firm
obligation or necessity, and we use ‘should’
and ‘ought to’ for a recommendation or
moral obligation.
Subject+ modal(+)(-)+ verb + C.
You must see a doctor at once
You should stop smoking
Necessity
The modal verbs “must,” “have to” and
“have got to” show that something is
not optional; it is necessary.
Subject+ modal+ vrb bse form
She has to study tonight.
Do/Does/Did+ subject+ modal+ verb + C +?
Does she have to study tonight?
Prohibition
Must not and cannot (and their contracted forms
mustn’t and can’t) convey the idea that something
is not allowed or prohibited, often by law
Subject + can’t / must not + verb + C
You can’t wear a hat in class.
You must not use a cell phone.
Possibility
We use ‘may‘, ‘might‘ and ‘could‘ when we
think that something is possible. Statements
with ‘may’, ‘might’, and ‘could‘ can refer to
past, present, or future possibilities.
Subject+ May / Might / Could + the verb (base form
without ‘to’) + C
Look at Jack! He might be in a hurry to meet with Catherine.
Don’t eat that mushroom. It could be poisonous.
Criticism
Is used to express that something was advisable
to do but was not done or that something was
not advisable to do but was done.
Subject+ could, might, and
should/shouldn't + verb infinitive + C
You should have asked me before
you took the whole pie.
Advice
Are mainly used to give or ask for advice.
Subject + should/ shouldn't ought to had/’d
better + verb infinitive + C
He should study more.
Deduction
We can use MUST, MAY, MIGHT, COULD and CAN'T
to express how sure we are about something
happening in the present or the future.
Subject + must/may/might/could + verb + C
She must study very hard
because she gets really good
marks.