University of Texas at Austin
Tex's French Grammar: Regular "Ir" Verbs Present Tense
This site from Tex's French Grammar, which is provided by the University of Texas, is a wonderful site with clear explanationsof regular "ir" verbs with written and audio usage examples and interactive practice exercises.
University of Texas at Austin
Tex's French Grammar: Partir, Sortir, Quitter, Laisser
This site explains the distinguishing nuances and uses in French of the verbs partir, sortir, quitter and laisser. Touches on transitive vs. intransitive. Provides interesting, short written and audio examples and practice exercises.