Shall and will are two of the English modal verbs. They have various uses, including the expression of propositions about the future, in what is usually referred to as the future tense of English. ... Shall is, however, still widely used in bureaucratic documents, especially documents written by lawyers.

Where we use will and shall?

As a general rule, use 'will' for affirmative and negative sentences about the future. Use 'will' for requests too. If you want to make an offer or suggestion with I/we, use 'shall' in the question form. For very formal statements, especially to describe obligations, use 'shall'.

What is the modals of will?

"Will" is a modal verb used with promises or voluntary actions that take place in the future. "Will" can also be used to make predictions about the future. ... voluntary action. He thinks it will rain tomorrow.