http://www.ucalgary.ca/cted/Repsit/Hotpotatoes/subjonctif/subjonctif4.htm
http://w3.restena.lu/amifra/exos/gram/indsubj2.htm
http://www.languageguide.org/french/grammar/exercises/subjunctive1.htm
explication en anglais + exercises
http://atschool.eduweb.co.uk/rgshiwyc/school/curric/French/Subjonctif/SubjonctifIndex.htm