Although it is more common to find it in literature and in formal content, in Spanish we can use the auxiliary verb haber + de + infinitive. This verbal structure is used in two different ways:
Haber de + infinitive: obligation, convenience, necessity
It expresses an obligation although not a strong one, or the convenience or necessity of doing something.
Have a look and listen to these examples:
Its more colloquial and informal equivalent is:
tener que/ deber/necesitar + infinitive
Tengo que/Debo/Necesito coger el tren de las diez para llegar a tiempo a mi destino.
Haber de + infinitive: future action.
Have a look and listen to these examples:
Its more colloquial and informal equivalent is:
the main verb in the future tense
Esta guerra acabará con la esperanza de paz de la gente.
Remember:
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