Imprecise quantities are expressed using adverbs of quantity, which are usually followed by the preposition de.
Il a beaucoup de chiens. — He has a lot of dogs.
Il boit trop de bière. — He is drinking too much beer.
Combien de jupes as-tu ? — How many skirts do you have?
No matter whether the noun following de is plural or singular, de always remains de.
However, other articles can follow adverbs of quantity when the noun is specific.
Beaucoup des (de + les) amis de mon frère sont là. — Many of my brother’s friends are here.
Je veux plus du (de + le) même. — I want more of the same.
This latter case does not apply to this sentence as the speaker is asking about skirts in general - there is no specificity.
Really minor and subtle difference, maybe French people speak more clearly than this synthetic voice...
By the way, let me add another sentence: "How many Jews do you have?", sounds just like them! xP
In french any (s) at the end of any word is silence. Probably any last alphabet is silence. Hope this helps.
No, you have combined two different question forms in the same sentence. You may say:
- Combien de jupes as-tu ?
- Combien de jupes tu as ?
- ...in addition to the "vous avez/avez-vous" forms.