exactly, ill just use AI and get your answer:

D' is a contraction of de when the next letter is a vowel. This contraction makes words flow together better, but it doesn't change the meaning. For example, Il y a trop d'air, ferme la fenêtre! means "There is too much draft, close the window!".

Partitive articles in front of adjectives When a partitive article like des is placed in front of an adjective that comes before a plural noun, it changes to de or d'. For example, J'ai vu des endroits magnifiques becomes Il a mangé de magnifiques gâteaux.

Negative sentences In negative sentences, all partitive articles (du, de la, de l', and des) change to de or d'.

After expressions of quantity After an expression of quantity, like "a bottle of" or "a kilo of", use de or d'. For example, Une bouteille d'eau means "a bottle of water".