The subjunctive mood is primarily used in French to express uncertainty, but is also often required in other circumstances, following phrases containing the word "que".Expressing doubt:"Il est probable qu'on ait ...""Je ne suis pas certain(e) qu'il soit..."Expressing a feeling:"J'ai peur que tu fasses..."Expressing necessity:"Il faut que je mange..."After certain conjunctions:"Bien qu'il reste...""Pour que je puisse..."Showing that you are confident using the subjunctive in essays can really boost your mark, especially when the subjunctive verb is irregular. I found it helpful to start by learning a few key subjunctive phrases that I began using when I could, and built my confidence with it from there. Hope this helps! :)