Formation: The Future Indefinite tense is formed by means of the auxiliary verbs shall for the first person and will for the second and third persons plus the first form of the notional verb. The contracted negative forms are shan't and won't.
Note: In American English the Future Indefinite and all other future tenses are formed by means of the auxiliary verb will for all persons.
The Future Indefinite is used to denote a customary repeated action in the future.
I'll call you every day.
Я буду звонить тебе каждый день.
The Future Indefinite can be also used to denote a simple action in the future.
I'll help you to do this translation.
Я помогу тебе сделать этот перевод.
Note: In the modern colloquial English the Future Indefinite competes with the expression to be going + to infinitive. To distinguish between them the following rules can be used:
To speak about somebody's plans to be going is used.
We are going to discuss this question on Monday.
Мы собираемся обсудить этот вопрос в понедельник.
If an action is previously arranged, it is expressed by to be going.
You are going to have your exam on Friday.
У нас будет экзамен в пятницу.
To express promise the Future Indefinite is used.
I will give you this money.
Я дам тебе эти деньги.
If the decision to perform an action is taken during the talk, the Future Indefinite is used.
Are you cold? I'll switch on the heater.
Ты замерз? Я включу обогреватель.
To express somebody’s supposition the Future Indefinite is used, if the speaker doesn't give any grounds for it and to be going if he gives them.
Take your umbrella, I think it will rain.
Возьми зонтик, я думаю, пойдет дождь.
It's very cold today. You are going to get cold in this thin coat.
Сегодня холодно. Ты замерзнешь в этом тонком пальто.