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"Must" is an auxiliary verb which is often translated as "deber", and "have to" is a transitive verb phrase which is often translated as "tener que". Learn more about the difference between "must" and "have to" below.
must(
muhst
)
An auxiliary verb, or helper verb, is a conjugated verb that comes before a main verb and determines the main verb's tense, mood, or aspect (e.g., I have gone.).
auxiliary verb
a. deber
You must stay in bed after the operation.Debes quedarte en cama después de la operación.
b. tener que
You must bring your books to class.Tienes que traer tus libros a clase.
a. tener que
We must have lunch some time.Tenemos que quedarnos a almorzar un día de estos.
a. deber de
You must be very tired after your long drive.Debes de estar muy cansado después de manejar tanto.
A noun is a word referring to a person, animal, place, thing, feeling, or idea (e.g., man, dog, house).
noun
a.
This refers to an idiomatic word or phrase for which there is no word-for-word translation.
no direct translation
Having a cell phone is a must nowadays.Hoy en día es indispensable tener un celular.
This album is a must for all fans of jazz music.Este es un álbum que no deben perderse todos los aficionados a la música jazz.
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have to(
hahf
 
tu
)
A transitive verb phrase is a phrase that combines a verb with a preposition or other particle and requires a direct object (e.g., take out the trash.).
transitive verb phrase
a. tener que
I have to finish my homework before I can play video games.Tengo que terminar mi tarea antes de poder jugar videojuegos.
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