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Modal Verbs

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by

Nadia Bouadi

on 15 October 2014

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Transcript of Modal Verbs

Should, shouldn't
It is used to give an
opinion, advice or polite instructions
.

Should
It is a good thing to do

Tom should go to bed earlier. He goes to bed very late and he is always tired.

Shouldn't
It is not a good thing to do.
Tom shouldn't go to bed so late.

MODAL VERBS
Can
Must
It's related to
CERTAINTY

We are sure or almost sure about something because it is logical. Especially common with the verb be.
Positive logical deduction



You must be tired after your long journey.
May, might
They express
uncertainty
or
possibility
It is possible that...
Mustn't
It describes something that is
prohibited.


It is necessary not to do it

You mustn't touch the pictures.

(It is not allowed. It's against the rules)
MODAL VERBS
They are used
with other verbs
to express ability, obligation, possibility, and so on.
Modal verbs are unlike other verbs.
They do not change
their form (spelling) and they have no infinitive or participle (past/present).
Modals are
auxiliary verbs
. They do not need an additional auxiliary in negatives or questions.
= Know how to...

I'd like to be able to swim.

When I was young I could run very fast.
Ability
Ask people to do things
Can you...?


Could you...?
Can you close the window, please?
Could you wait a moment, please?
Can I have...?/ Could I have...?
Can/ Could I have two kilos of apples, please?
Ask for something
Is it OK to do something?
Can I...?
Can I borrow your umbrella?
Could I...?
Could I borrow your umbrella?
Can't
It's related to
CERTAINTY

We are sure or almost sure about something because it is logical. Especially common with the verb be.

Negative logical deduction

That can't be Sue. She's in Brazil.
Could
They express
uncertainty
or
possibility


It is possible that...
.

I don't want to go out. I could get wet.

OBLIGATION
The
speaker personally
feels something is important.
The windows are very dirty. I must clean them.
Have to
OBLIGATION
It is used when
the situation
makes something necessary
In many countries, men have to do military service.
I might/ may play tennis tomorrow.
Sue might/ may not come to the party.

May I ask a question?
Is it OK to.../
Can I...?


Don't have to
It describes something that is
not necessary.


It is not necessary to do it
You don't have to leave now.
(It's not necessary. You have a choice)
Full transcript