Tu vs Vous

French has two words for our subject personal pronoun "you," and they are "tu" and "vous."
So, when do you use either one of them?

Very simple: when you talk to one friend, a relative or a pet, you use "tu."
                      In all other cases (a person whom you'd address as Sir, Ma'm, Mrs, Miss), and anytime
                       when "you" implies more than one person--plural) you must use "vous."

Practice--would you use "tu" or "vous" in the following:

Your friend Arnold -------------------------------------------------(tu)

Your grandma-------------------------------------------------------(tu)

your teacher---------------------------------------------------------(vous)

Your friends Laura and George--------------------------------(vous)

Your pet cow Geraldine------------------------------------------(tu or: MOOOOOOOOOO!)

Your Mom and Dad-----------------------------------------------(vous)