Thanks so much Florian! This has made it alot clearer for me!

Hello Aisling ! Let's take an example with the verb ''se souvenir'' (to remember) With the passé composé you have : je me suis souvenu, tu t'es souvenu, il s'est souvenu nous nous sommes souvenuS, vous vous êtes souvenuS, ils se sont souvenuS, elles se sont souvenuES Note that the auxilary used here is ''être'', so in French with this one you make it agree with gender and number. But obviously French is not that simple and there are exceptions, some reflexive verbs do not change even if there is the auxilary ''être'' used (se plaire, se sourire, se nuire, se ressembler, ...). Reflexive verbs are a really difficult part of the French grammar, because it depends on many things : whether the verb exists in a non-reflexive form or not, if the verb ''makes the action'' or undergoes the action'', so it is always tricky, even for native speaker, to conjugate correctly this type of verb. Hope it will help you !