We will focus on the predictions about the future. For making them, we will use different modal verbs (will, may, might, could) depending on the possibilities of these facts.
You can see this presentation about the future tenses ;)
Future simple (Will + Verb / Won't + verb)
Activities
Future Be Going to + Verb
Activities
Differences between "Will" and "Going to"
Activities
MODAL VERBS FOR PROBABILITES