The 'simple' future is composed of two parts:
will / shall + the infinitive without "to" Subject will infinitive without to
He will leave...
I will go
I shall go
They will not see.
They won't see .
Will she ask?
The simple future refers to a time later than now, and expresses facts or certainty. In this case there is no 'attitude'.
The simple future is used:
- to predict a future event: It will rain tomorrow.
- (with I/we) to express a spontaneous decision: I'll pay for the tickets by credit card.
- to express willingness: I'll do the washing-up. He'll carry your bag for you.
- (in the negative form) to express unwillingness: The baby won't eat his soup. I won't leave until I've seen the manager!
- (with I in the interrogative form) to make an offer: Shall I open the window?
- (with we in the interrogative form) to make a suggestion: Shall we go to the cinema tonight?
- (with I in the interrogative form) to ask for advice or instructions: What shall I tell the boss about this money?
- (with you) to give orders: You will do exactly as I say.
- (with you) to give an invitation: Will you come to the dance with me? Will you marry me?
NOTE: In modern English will is preferred to shall.
Shall is mainly used with I and we to make an offer or suggestion and, or to ask for advice. With the other persons (you, he, she, they) shall is only used in literary or poetic situations
"With rings on her fingers and bells on her toes,
She shall have music wherever she goes.