Still not getting it...

Question

Thsee are what I think are correct:Je veux le café = I want the coffeeJe veux le café = I want coffeeJe veux du café = I want some coffeeIls veulent des cafés = They want coffeesIls veulent du café = They want some coffeeILS veulent le café = They want coffeeIls veulent de café = They want a coffee.I think these are all correct grammar, depending on the situation.Please correct me if I'm wrong.

Accepted Answer

I can see your confusion Sandra but not all those are correct -
If you use 'le' it means 'the', definite article, so if you are shown a list of beverages, you might say -
Je veux ( although 'je voudrais' which is, 'I'd like' would be more customary) le café, s'il vous plaît.
If you say -
Je veux un café = I want a coffee
Ils veulent un café = They want a coffee
Ils veulent des cafés = They want coffees
Je veux /ils veulent du café = I/they want  some coffee
Je ne veux pas/ils ne veulent pas de café = I/they don't want any coffee
Not easy I know, but hope this helps!

Answer

Ils veulent de café = They want a coffee (This couldn't true. Because "de" is never used to mean "a" while it may seem as the logical singular form of  "des" the lessons already point out that the singular form is "un/une".