These are always used alongside another verb.

These can never be used alone.

In the third person singular form, ‘s’ is not used with these verbs.

They can be used to indicate probability, give advice, make requests, and more.

The form of the modals never changes.

The Infinitive, past-participle, and present participle forms of these verbs are not present.

They do have past forms.

CAN: representa la capacidad, la sugerencia, la solicitud.

BE ABLE TO: representa la capacidad.

CAN´T: representar la certeza de algo que es imposible que suceda.

COULD: (forma pasada de can) representa la habilidad, una sugerencia o una solicitud.

MAY: representa la posibilidad de que algo que se supone que suceda, un permiso o solicitud formal.

MIGHT: (forma pasada de may) representa la posibilidad.

MUST: representa la obligación o la certeza de que algo es verdad.

HAVE TO: representar la obligación.

NEED TO: representar la obligación.

SHOULD: (forma pasada de shall (deber)) y OUGHT TO representan una opinión o un consejo.

USED TO: representa una acción repetida en el pasado.

WILL: se usa como auxiliar de tiempo futuro.

WOULD: (forma pasada de will) representa un deseo, una petición o un hábito pasado.

Sofia can speak many different languages. 

She was able to open the drawer. 

When the traffic signals turn red, everyone must stop. 

Smoking can cause serious health issues. 

Could you please pass the salt?

Next week, I might take leave. 

You may get out of my class. 

Since plenty of fruits is kept in the fridge, I need not buy anymore. 

He should come and apologise to you for her mistakes. 

He has been working so hard. He ought to be really tired. 

We shall move out of this city very soon.

All the students have to memorise these tables by tomorrow. 

Can you help me with this problem?

We should leave early to avoid traffic.

Could you help me with this?

Can I go to the bathroom?

May I leave the room?

Would you like some tea?

She is able to swim across the lake.

They will complete the assignment before the deadline.