Elle and on are both subject pronouns. They are not used together in the manner you described in your question.
It seems like you are conjugating the verb "avoir" (to have). In this case, you would be writing "elle/on a", which means "she/one has".
If you mean 'elle' as in French, it is hi.
elle s'assoit mean she sits or she's sitting.
"Elle porte" means: She wears. or She carries.
Elle s'appelle comment means What is her name?
She lied.
If you mean 'elle' as in French, it is hi.
elle s'assoit mean she sits or she's sitting.
elle l'aime means she loves him (or her) in French.
Elle a faim means "She is hungry".
"Elle porte" means: She wears. or She carries.
she/her
she = elle
Elle est gayShe is gay. (lesbian)
elle adore lire - she loves reading
Where was he(il)/she(elle) born?
she likes/she loves is translated "elle aime" in French
Elle s'appelle comment means What is her name?