I hope that you remember some English grammar from previous lessons. Anyway, here is a full course concerning nearly all the grammar points in English. More than enough for you for this course. The best way to learn grammer is to read the rule, do some exercises and then through reading and listening reinforce this so that it becomes second nature over time.

Grammar points: Here you can find all the notes you need for the majority of English grammar.

Grammar videos: All the grammar points have a video you can watch with the explanation in Italian.

Exercises: Here are some exercises on some of the more difficult points.