MODAL VERBS EXERCISES. Present and past modal verb exercises. Can could exercises. Must exercises. Should exercises. May might exercises. Would exercises. Had better exercises. Be able to, Would rather , Have to...auxiliary verbs.

http://www.agendaweb.org/verbs/modals-exercises.html

 MODAL VERBS EXERCISES. Present and past modal verb exercises. Can could exercises. Must exercises. Should exercises. May might exercises. Would exercises. Had better exercises. Be able to, Would rather , Have to...auxiliary verbs.