I've started learning French a few days ago. Loving it so far.
I have a couple questions though which weren't explained clearly in my online lessons.
1. At first I thought adjectives always goes before the subject. For example, a red apple - un pomme rouge. However, in the last couple lessons, I've noticed they sometimes say it the other way around, red roses - des rouges roses. Why's that?
2. If I understand correctly, you use du/des when you mean to say some (although, you don't always say some in English in those instances). When you use du/des, you don't use a preposition - le/la/les. But then there was one sentence when they said some water and the French translation was du l'eau. Why's that?
Not a native speaker, but I remember learning these... I might be wrong though.
Anyway, for the adj thing. It's NOT always adj before the subject. In fact, in French, majority of the cases is that you have the adj after subject. When you are talking about number adj, size, appearance, it's usually ADJ BEFORE SUBJECT, like: un jeune homme. / When you are talking about nationalities, colour, de forme de religion et les adjectifs dérives d'un nom, it's ADJ AFTER THE SUBJECT, like: un restaurant italien, une chemise rouge.
But there are also a few situations that's opposite. Like, for example, "ancienne" (old). If you want to mean your old car, the one your used before, you say "mon ancienne voiture"; but if you mean a very old car (manufactured a long time ago), you say "une voiture ancienne". So it depends on the situation.
Answer to your second question, I'm not very good at those les/le/la, du/des, but I do remember that whenever you are talking about drinks, water included, you always use "du", like du jus d'orange or du jus de fraise...
Hope this helps but I'm still learning it myself so feel free to correct me if there's any mistake!