Those two words do not exactly go together.
Je (I) goes with ai (have) to make J'ai (I have)
Avez is a different conjugation to suit vous (You to a person in authority, or You in plural)
So if you heard J'avez in a sentence before, It must have started with Vous j'avez...
French is confusing.
Sorry for my first answer.
j'avez doesn't work because avez is he present form of avoir ,which means to have., for you... so for I (je) the present form of to have would be ai.... J'ai ...means to have.
"Ou avez-vous appris le français?" means "Where did you learn French?" in English.
"where did you met your spouse?"
"Vous avez toute la classe" means "You have all the class" in English. It is a compliment used to describe someone who exudes elegance, sophistication, and style in their demeanor or behavior.
It means "In which street did you spend your childhood?" in French.
j'avez doesn't work because avez is he present form of avoir ,which means to have., for you... so for I (je) the present form of to have would be ai.... J'ai ...means to have.
Do you have? Avez-vous une voiture? Do you have a car?
you have
"Est-ce que vous avez ..." means "do you have..." in French.
"How old are you?"
De quoi avez-vous besoin ? means What do you need now?
ou avez-vous rencontre votre conjoint means: or did you meet your spouse.
"You were a dream"
It means : You lost
You disappeared yesterday
un hibou (n 'x' when singular,only when plural) is an owl in French. 'Avez-vous' is a question meaning 'do you have?', so 'avez-vous mon hibou' means 'do you have my owl' in English.
Comment avez-vous connu notre site means "how have you known about our (web)site?"