Future: To be going to + hele werkwoord
Someone is planning something/making a decision:Frits: "Patrick told me you're going on holiday."
Marly: "Yes, we are going to invite our dearest friends to come with us."
--> It's already agreed upon earlier --> to be going to + base form of the verb
Someone makes a prediction:
He read that the weather is going to be great next week.
--> There's evidence (he read it/saw it happening) --> to be going to + base form of the verb