Obligations futures

Forme

Quand on écrit des obligations futures, on peut utiliser une formule formelle composée de deux éléments:
le verbe "to be" au présent, conjugué pour s'accorder avec le sujet + l'infinitif du verbe principal

To travel, comme obligation future
Affirmatif Négatif Interrogatif Interrogatif Négatif
I am to travel. I am not to travel. Am I to travel? Am I not to travel?
You are to travel. You are not to travel. Are you to travel? Aren't you to travel?
He is to travel. He is not to travel. Is he to travel? Isn't he to travel?
It is to travel. It is not to travel. Is it to travel? Isn't it to travel?
We are to travel. We are not to travel. Are we to travel? Aren't we to travel?
They are to travel. They are not to travel. Are they to travel? Aren't they to travel?

Fonction

Cette utilisation se réfère à une obligation de faire quelque chose à un moment ultérieur à l’instant présent. Elle est semblable à must, mais elle suggère que quelque chose a été préparé ou organisé pour nous. On ne l’utilise normalement pas en anglais parlé.

Exemples
  • You are to leave this room at once, and you are to travel by train to London.
  • In London you are to pick up your ticket from Mr Smith, and you are to fly to your destination alone.
  • When you arrive, you are to meet our agent, Mr X, who will give you further information.
  • You are to destroy this message now.