I've been studying French for quite a while now, and yet I still have trouble! I was wondering if any fluent speaker could help me with some of these, of which I only have a basic understanding:

• The difference between de/du/de la/des in all its uses.

• Pronouns: How to use elle/il/le/la/lui (The use of 'elle' and 'il' has my frilly pantsu in a right twist!)

I understand that these can be quite difficult to explain, but I would really appreciate the help.

(v´▽`)v ｍｅｒｃｉ！

du = some; for masculine nouns
du pain = some bread (or just bread, quite nuanced)
de la = some; for feminine noun
de la tarte = some pie (or piece of pie, find out with context)

de = some; for words with an apostrophe pronounce "l'"
de l'or = some gold, de l'eau = some water (both genders: or is masculine, eau is feminine.)

des = some; plural
des batons = some staves

elle = she
il = he
both il and elle are nominative.

le = masculine demonstrative pronoun, when talking about a particuliar thing.
"le chien" is one specific chien, as oppposed to "un chien"
la = feminine demonstrative pronoun
"la ferme" a specific ferme, as opposed to "une ferme" which is just a random ferme.
both are accusative

lui = Him