French pronouns are inflected to indicate their role in the sentence (subject, direct object, and so on), as well as to reflect the person, gender, and number of their referents. While English draws some of these distinctions as well, French draws them in many places where English does not; as a result, there are many more pronouns in French than there are in English. [Source]
J'
ai
perdu
mon
sac.
I have lost my bag.
Ne
me
touchez
pas!
Don't touch me!
S'
il
vous
plaît.
Please. (Formal)