2. GOING TO We say something is going to happen when it has already been planned. Example: Are you going to fly to Germany? No, we're going to drive.
3. GOING TO We also use it to show something has already been decided. Example : We're going to buy a new house next year.
4. GOING TO We also use going to when we can see something is about to happen. Example : Look at that cloud. I think it is going to rain.
5. GOING TO You can also use ’’going to’’ to predict the future based upon the evidence now. Example : I think my friend Louise is going to have a baby.
6. WILL When we give information about the future or predict future events that are not certain we usually use will. Example: Who do you think will win the election? I'm not sure but I think the current party will win.
7. WILL We can also use will to make promises for the future Example: I will see you tomorrow
8. WILL It can also be used in formal situations to express planned events and is preferred in formal written English. Example: The party will start at 10.00pm