http://www.e-anglais.com/modals1.php3 http://www.smccd.net/accounts/sevas/esl/reviewlesson/modalsum.html Modal Summary (c) Grammar Check

http://www.smccd.net/accounts/sevas/esl/gramcheck/modals1.html (c) Grammar Check

http://web2.uvcs.uvic.ca/elc/studyzone/330/grammar/negmod.htm "don't have" and mustn't" (c) ELC Courses, UVic English Language Centre

http://www.better-english.com/grammar/can1.htm (c) better-English.com

http://www.better-english.com/grammar/can2.htm (c) better-English.com

http://www.better-english.com/grammar/can3.htm (c) better-English.com

http://www.better-english.com/grammar/could1.htm (c) better-English.com

http://www.better-english.com/grammar/could2.htm (c) better-English.com

http://www.better-english.com/grammar/should1.htm (c) better-English.com

http://www.better-english.com/grammar/should2.htm (c) better-English.com

http://www.better-english.com/grammar/neednthave.htm (c) better-English.com

http://www.better-english.com/grammar/mustnt.htm (c) better-English.com

http://www.better-english.com/grammar/neednt.htm (c) better-English.com

http://esl.about.com/library/quiz/blgrquiz_canbeable.htm "can" and "be able to" quiz (c) about.com

http://www.smic.be/smic5022/ (c) Online English Exercises - 4 gap-fill exercises (must / have to / needn't / mustn't / didn't have to / needn't have)

http://www.smccd.net/accounts/sevas/esl/gramcheck/gramcheck3-5/modalflashcds.html Past Modals / Flashcards (c) Grammar Check

http://www.collegeem.qc.ca/cemdept/anglais/havetmus.htm © ESL Blue(s)

http://www.collegeem.qc.ca/cemdept/anglais/musthavt.htm must (not) / (don't) have to © ESL Blue(s)

http://sites.netscape.net/djones55are/shouldwould.htm should or would, multiple choice (c) Doug's Interactive English Exercises

http://sites.netscape.net/djones55are/cancould.htm Explanation chart and multiple choice questions (c) Doug's Interactive English Exercises

http://sites.netscape.net/djones55are/necpos1.htm Necessity or possibility (c) Doug's Interactive English Exercises

http://sites.netscape.net/djones55are/modal_rev_quiz.htm Modal Review Quiz (c) Doug's Interactive English Exercises