When we write about future obligations, we can use a formal pattern composed of two elements
the verb to be in the present tense conjugated to match the subject + the infinitive of the main verb
To travel, as a future obligation
|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?|
In written English, we can use this pattern to refer to an obligation or requirement that we do something at a time later than now. It is similar in meaning to must, but there is a suggestion that something has been arranged or organised for us. It is not normally used in spoken English.
- 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.