BE CAN DO HAVE auxiliary verbs. Verb to do present simple. Verb can exercises. Present simple. Verb can exercises. Modal can and can exercises. To do, have and can auxiliary verb exercises.

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

 BE CAN DO HAVE auxiliary verbs. Verb to do present simple. Verb can exercises. Present simple. Verb can exercises. Modal can and can exercises. To do, have and can auxiliary verb exercises.