USE THE SIMPLE PRESENT FOR SCHEDULES.
It starts at 7:00.
I'll come right over to meet you.
I'm not doing anything tonight.
I'll just stop by my apartment to change clothes.
USE WILL WHEN YOU DECIDE TO DO SOMETHING AS YOU ARE SPEAKING.
USE THE PRESENT CONTINUOUS OR GOING TO (NOT WILL) FOR DECISIONS YOU'VE MADE AND FIXED PLANS.
Our project won't be finished on time.
My boss is going to make us work late Friday.
I have my aerobics class tomorrow.
We're going to have dinner together.
USE WILL OR GOING TO FOR FACTUAL INFORMATION OR PREDICTIONS BASED ON WHAT YOU KNOW
I'm meeting Anna after my aerobics class.
You're going to be out of town, but you'll be back Friday?
