Forget the future! It's all about the past now! You can start by revising and practising irregular verbs here. Don't forget to learn the pronunciation, too. It's just as important as the spelling.
You can download the exercise we did in class here.
Watch this BBC video and see how to use will, going to and the present continuous in a natural way.
If you need more practice, here you have plenty of exercises and you'll find a video, explanation and exercises here. Are you GOING TO (plan) try them? I think you WILL find them useful (prediction 😉)