de

of (indicates possession, association or relationship)

Paris est la capitale de la France.

used attributively, often translated into English as a compound word

un jus d'orange

of (indicates an amount)

5 kilos de pommes.

used before infinitive phrases; often corresponding to an English to-infinitive or gerund:; after certain verbs

J’ai arrêté de fumer.

used before infinitive phrases; often corresponding to an English to-infinitive or gerund:; after impersonal constructions, with il or ce/ça as the subject referring back to the infinitive phrase

Il est important de le préciser

from (used to indicate origin)

Elle vient de France.

used before infinitive phrases; often corresponding to an English to-infinitive or gerund:; after a noun, expressing possessive-like association to that noun

l'heure de partir

used before infinitive phrases; often corresponding to an English to-infinitive or gerund:; optionally when following a predicative verb

L'important, c'est de participer.

of (used to indicate cause)

mourir de faim

from (used to indicate the start of a time or range)

De 9:00 à 11:00 je ne serai pas libre.

by (an amount)

Boire trois tasses par jour réduirait de 20 % les risques de contracter une maladie.

introduces the indirect object of some verbs; variously translated in English

On parlait de notre prochain voyage.

used before infinitive phrases; often corresponding to an English to-infinitive or gerund:; after certain adjectives

Je suis content d'être rentré.

used before infinitive phrases; often corresponding to an English to-infinitive or gerund:; in narration, introduces an action made by a character, especially as part of a dialogue

Les aides de camp de M. Dubourg éclatent en gros rires; et la tourbe de rire à l'unisson, et le général de piquer sa mazette qui caracolait comme une bête éreintée...

used before attributive adjectives:; modifying indefinite and interrogative pronouns, pronominal phrases and other non-nominal substantives

Vous avez vu quelqu'un d'autre?

used before attributive adjectives:; past participles modifying indefinite noun phrases in a passive voice construction with the auxiliary omitted

Voilà une bonne chose de faite !

used before attributive adjectives:; used in miscellaneous idiomatic phrases

pour de vrai