Du, de la, des — some of something

CEFR A1Taught in Module 07, Faire des achats

When you eat or buy part of something rather than a whole countable thing, French requires the partitive article. English usually says nothing at all, which is why this is easy to forget.

PartitiveExample
masculineduJe voudrais du pain. (I'd like some bread.)
femininede laJe prends de la salade. (I'm having some salad.)
before a vowelde l'Il boit de l'eau. (He drinks water.)
pluraldesElle achète des fruits. (She buys fruit.)

You cannot leave it out. Je voudrais pain is not a sentence.

After a negative, all of them become "de": "Je prends du café." → "Je ne prends pas de café." "Il y a des tomates." → "Il n'y a pas de tomates."

What this unlocks

Knowing the rule is not the same as producing it.

This page explains the pattern. The track drills it: the point arrives inside a mini-dialogue, then production marked against a CEFR descriptor, then a module test that returns you to your two weakest sessions if you miss it.