‘Shall’ or ‘Will’?
The traditional rule is that shall is used with first person pronouns (i.e. I and we) to form the future tense, while will is used with second and third person forms (i.e. you, he, she, it, they). For example:
Example: I shall be late.- Я опоздаю.
Example: They will not have enough food.- У них не будет достаточно еды.
However, when it comes to expressing a strong determination to do something, the roles are reversed: will is used with the first person, and shall with the second and third. For example:
Example: I will not tolerate such behaviour.- Я не потерплю такого поведения.
Example: You shall go to the ball!- Вы пойдете на бал!
In practice, though, the two words are used more or less interchangeably, and this is now an acceptable part of standard British and American English; however, the word shall is now seldom used in any normal context in American English.