By the time you take your exam, we will have been working together for 4 years.
I will be playing football at 5 pm tomorrow.
I am cooking your favourite meal tonight.
My flight leaves at 9 am.
No matter what she decides, I will still love her.
By next week, you will have received your results.
My classmates and I will be relaxing on Christmas Day.
Activity completed BY a specific future time
Timetable or Schedule, Not Personal
With No Matter + wh- word
Action that will be in progress at a specific future time
Personal Plan for the near future (+time phrase)
Activity that has already began and will STILL be in progress at a specific future time
Pre-arranged future action