J'ai beaucoup de livres.
English: I have a lot of books.
Expressions of quantity in French (like 'beaucoup de', 'peu de', 'assez de') are used to say how much or how many of something there is.
Use these expressions to talk about the amount of things, such as food, objects, or people. They are common when you want to say there is a lot, a little, enough, or too much of something.
J'ai beaucoup de livres.
English: I have a lot of books.
Il y a peu de sucre.
English: There is little sugar.
Nous avons assez de pain.
English: We have enough bread.
Elle mange trop de chocolat.
English: She eats too much chocolate.
Combien de pommes veux-tu ?
English: How many apples do you want?