I'd like a good explain and some exemples. Thanks.
When you use "will" in your sentences you are not well sure about the event that might happen in the future( %50 possibility ) but when you use "going to" you wanna say something that should happen in the future and the possibility of that event is %100
Example for "will" : My father will buy me that bike if I get good marks.
Example for "going to" : It is going to be night after 8 PM
Thank you very much !
* if you want to talk about future facts or things are true than you use will, for example: «The President will serve for four years». If you are not sure about the future u use also will but with expressions such: 'probably', 'I think', 'I hope', 'Possibly'...etc.
* If you are predecting the future based on evidence in the present situation, you use ' going to', for example: «The traffic is terrible. We're going to miss our flight.»
* In general, at the moment you make the decision you use WILL, and once you made the decision, you use GOING TO .