Past tenses

http://fog.ccsf.cc.ca.us/~creitan/clark.htm

http://fog.ccsf.cc.ca.us/~creitan/blanche.htm

http://www.swarthmore.edu/Humanities/gmoskos1/interexercice/pcompose.htm

http://www.columbia.edu/~fms5/fim2.html

http://www.ecs.qc.ca/teachersworlds/turbide/testjava/tablematiere.html