r/EnglishGrammar

Hi there,

I have some confused about "be going to" and "will".

I have a grammar book that says:

"be going to" is for "I am going to do something I have decided to do it, my intention is to do it".

"Will" is for "when you offer something or decide to do something".

I don't actually understand them, I feel them are same.

Can somebody explain and give me some examples?