Modal Verbs

Alba Rodríguez

MODAL VERBS

What are modal verbs?

When do we use modal verbs?

What are the rules for modal verbs?

He musts

Iyou he she must it we they

1. SAME FORM FOR EVERYONE!

They don't can... Does she must?

or... should I?

I shouldn't...

I should...

2. NO AUXILIARY VERB FOR NEGATIVE AND INTERROGATIVE FORMS

EXCEPTIONS!!!!

I must to go now

3. MODAL VERBS ARE FOLLOWED BY INFINITIVE WITHOUT TO

could

could

can

should

must

been

was/were

am/is/are

to be

PAST PARTICIPLE

PAST

PRESENT

INFINITIVE

4. THEY ONLY HAVE ONE TENSE: PRESENT OR PAST

MUST/HAVE TO obligation But... what is the difference???

MODAL VERBS

meaning

Have to (tener que) Must (deber)

must

had to

had to

have/has to

to have to

PAST PARTICIPLE

PAST

PRESENT

INFINITIVE

use

grammar

Have to is a normal verbMust is a modal verb

Have to: external obligationsMust: personal obligations

could

could

Be able to is the verb to be, a normal verbCan/Could are modal verbs

can

been able to

was/were able to

am/is/are able to

to be able to

PAST PARTICIPLE

PAST

PRESENT

INFINITIVE

Now it's your turn:should / shouldn’t / can / can’t / must / mustn’t / have to / don't or doesn't have to / could / couldn't /

To be continued...