Sept ans means 'seven years' in French.
You would say "J'ai sept ans" in French to mean "I am seven."
Il a sept ans
I'm seventeen is 'j'ai dix-sept ans' in French.
You would say "Il a sept ans" in French to express that someone is 7 years old.
sept ans, sept années
"J'ai dix-sept ans" is how you say "I am 17 years old" in French.
J'ai vingt-sept ans
Elle a vingt sept ans
J'ai Sept ans. Be careful cos this may mean 'I am seven years old.
j'ai dix-sept ans
j'ai quarante-sept ans. (karont-set-ohn) - if u translate it literally, it means i have 47 years, but in french that's how they say I'm 47 years old
trente sept(37) ans