must

to be required to do something because of a rule or law

deber, tener que

• must + infinitive

Collocations must pay taxes · must follow the rules

• You must wear a helmet when you ride a bike.

  Debes llevar un casco cuando montas en bicicleta.

to be necessary or important to do something

deber, tener que

• must + infinitive

Collocations must finish the work · must go now

• We must leave early to catch the train.

  Debemos salir temprano para coger el tren.

to think that something is very likely or certain to happen

debe, tiene que ser

• must + infinitive

Collocations must be true · must have happened

• She must be at home now.

  Ella debe estar en casa ahora.

to think that something has probably happened in the past

debe haber, ha de tener que ser

• must + have + past participle

Collocations must have left early · must have been a mistake

• You must have missed the bus.

  Debes haberse perdido el autobús.

to suggest something strongly or give advice

debería, se debería

• must + infinitive

Collocations you must try it · we must talk about this

• You must see the new film.

  Deberías ver la nueva película.

to suggest something strongly or give advice (more formal)

debe, se debe

• must + infinitive

Collocations it must be done now · they must talk to the manager

• It must be discussed at the meeting.

  Debe ser discutido en la reunión.

to have a duty or responsibility to do something

deber, tener que

• must + infinitive

Collocations we must protect the environment · they must respect human rights

• We must do everything we can to help.

  Debemos hacer todo lo que podamos para ayudar.

to have a duty or responsibility to do something (more formal)

debe, tener por obligación

• must + infinitive

Collocations the government must act now · we must take action immediately

• The company must comply with the law.

  La empresa debe cumplir con la ley.