Use of the will-future
When do we use the will-future?
We use the will-future:
1. future actions happen without the speaker's intention (birthday, weather, etc.)
The sun will shine tomorrow.
Peter will be 15 next Tuesday.
2. predictions, assumptions (I think, I hope, I'm sure, I'm afraid)
I think Sue will arrive in Paris at 6 pm.
3. spontaneous actions (not planned)
Hang on! I'll have a word with you.