Language Guide
Participles
Site discusses formation of present participle and past participle (regular and irregular). Provides Sample phrases in both English and French to illustrate usage. Has a link at the end for interactive practice. Tons of other languages...
University of Texas at Austin
University of Texas: Francais Interactif
This full-featured interactive textbook encounter utilizes French speakers in real life scenarios. Well structured for work on grammatical concepts (links to Tex's French Grammar), vocabulary, listening comprehension and exposure to...
Other
Les Jeux D'orthonet: Interactive French Grammar Exercises
These multilevel French grammar interactive exercises concentrate on agreement of past participles and the like.
Other
Orthonet Quick Look Up to Check Orthography
Type in a noun or verb (infinitive only), and site quickly returns info and usage examples. Not a dictionary - provides sample phrases, notes on past participle agreement etc.
Columbia University
The Imparfait vs. the Passe Compose Ii
This site from London's Transport Museum provides a series of six exercises covering Le Passe Compose (Avoir and Etre), L?Imparfait, Le Present, Le Futur, Le Conditionnel. Students can print out their answers to check them, and they are...