Is the verb not conjugated whenever you're expressing obligation?

LouieA1Kwiziq community member

Is the verb not conjugated whenever you're expressing obligation?

For example, 

Tengo que ir al colegio.

Instead of using "voy", ir was used. Why is that?

Thanks.

Asked 4 years ago
InmaKwiziq team member

Hola Louie

With modal verbs we don't conjugate the main verb that comes after. You always need the infinitive.

What you need to conjugate is the modal/auxiliary verb.

Tengo que ir al colegio.

Debes ir al médico.

Quiero comprar un helado.

Saludos

Inma

Is the verb not conjugated whenever you're expressing obligation?

For example, 

Tengo que ir al colegio.

Instead of using "voy", ir was used. Why is that?

Thanks.

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