What is the 'immediate future' tense and how do I formulate it?

The immediate future tense is an easy tense to learn, as it is formulated in a very similar way in both French and English. It is used to describe actions that are "going to happen" (i.e. soon in the future). You take the present tense of the verb "to go" (aller) and the infinitive of the main verb (the form of verb that you'll find in the dictionary!).For example: "Tomorrow, I'm going to play football" "Demain, je vais jouer au foot""Je vais" is the first person singular present of "aller" (I'm going) and "jouer" is the infinitive of the verb "to play".
So, depending on whether you're describing something 'I, you, he/she, we, you (plural/polite), or they' is/are going to do, all you have to do is choose the appropriate part of 'aller' and add the infinitive of your main verb. And remember, the infinitive form of a verb never changes!