21.5Tener que
(a) Obligation^46 (p. 272); 47.1 (p. 276); 69.1 (p. 385)
Tendrás que contestar.
You will have to reply.
Tuvimos que aplazar la reunión.
We had to put off the meeting.
(b) Imperative
Tienes que subir por esa escalera mecánica. (see 69.1)
You have to go up that escalator.21.6Haber de
(a) Obligation 46.1 (p. 272); 47.3 (p. 279)
Hemos de separarnos. (see 46.1)
We’ll have to separate.
(b) Imperative 46.1 (p. 272)
Has de decírmelo todo. (see 46.1)
You’ll have to tell me everything.21.7Haber que
This is an impersonal expression, used only in the 3rd person singular (see 16.1.1.7).Obligation 46.3 (p. 274); 69.1 (p. 385)
Hay que callarlo. This must be kept quiet.MODAL AUXILIARY VERBS AND EXPRESSIONS 21.5