Elle est une belle de vingt ans.
vieux et beau - vieille et belle
A year in French is année but if you want to say 'she is 3 years old' you would say: 'elle a 3 ans'
He is one year old is "il est âgé d'un an" or simpler: "il a un an" in French.
"Belle femme" is "beautiful woman" in French.
Belle famille is beautiful family in French.
Beautiful skin in French is "Belle Peau" :)
Beautiful photographs in french is de belles photos
Belles personnes is "beautiful people" in French.
'Beautiful view' translates to French as 'belle vue'.
J'ai onze ans.
Beautiful all over in French is belle partout.
You are one year old. = Tu as un an. -OR- Vous avez un an. I am one year old. = J'ai un an.