There are two ways of expressing beauty. "Beau" is the masculine form & "belle" is the femmine form.
Ex.) Il est beau. This means; He is beautiful.
Ex.) Elle est beau. This means; She is beautiful.
Depending on weather the object is masculine or feminine depends on which form of it you should use.
Ex.) Ou est le cahier de maths? This means; Where is the math notebook. Because notebook is masculine, we use the "Il" form of it to answer the question. So the answer would be; Il est dans le sac a dos.
Belle un or Belle une depending on the gender of the person
You say, belle cousine.
Reste belle is how you say stay beautiful in French. You can also say: "garde ta beauté, garde ta fraîcheur which also means stay beautiful.
belle âme
"belle maison"
beau desastre
"The beautiful little one" is "la belle petite" in French, if you are referring to a girl.
beau petit that is how you say it
une belle fille
Beautiful skin in French is "Belle Peau" :)
Belle famille is beautiful family in French.
"Belle femme" is "beautiful woman" in French.
Bonjour, ma belle
Belles personnes is "beautiful people" in French.
Beautiful photographs in french is de belles photos
'Beautiful view' translates to French as 'belle vue'.
Beautiful all over in French is belle partout.
Beau Rêve = Beautiful Dream