Recently I asked about
I shall come, not will
whether it could be used instead of
I will definitely come, not maybe
How I came to such a question.
Here Shall and Will Usage
I asked about "Shall I win?" pointing that it could have some variants of understanding:
1) Shall I win? = Should I win? (suggestion)
2) Shall I win? = Will I win? (archaic with 1st person)
3) Shall I win? = is it 100% that I will win? (predestination\inevitability)
The excellent guy Mixolydian said either variant was possible, that it didn't matter what person you used "shall" with, it could have this "predestination\inevitability" anyway. Out of this we're getting that nowadays we can use "will" for simple future actions and "shall" for almost predicted (almost 100% surety of happening) future actions.
If I want to say to someone:
Don't be afraid, I will come anyway.
Don't get panicked, I will definitely come
Be sure, I will come in any case
I can use "shall" for it meanining an action into which I will put 100% effort:
I shall come!
And what if my original sentence is
Don't doubt, I will definitely come, not maybe or probably
Can I use
I shall come, not will
pointing that "shall" guarantees me putting all my strengths into it while "will" doesn't give any assuarance that I will do everything to finally come.
As I understood, it wasn't very easy to ask such a question because English was different everywhere - US, UK, Australie, Ireland etc. I heard it was acceptabse to use even "thee\thou" in Ireland or somewhere like that while all other world has already forgotten such words...