SIMPLE PRESENT

	affirmative	negative	question
I/you/we/they	I play.	I do not play.	Do I play?
he/she/it	He plays.	He does not play.	Does he play?

http://www.really-learn-english.com/simple-present-exercises.html

http://www.ego4u.com/en/cram-up/tests/simple-present-1

http://www.ego4u.com/en/cram-up/grammar/simple-present/form/exercises

http://www.englisch-hilfen.de/en/exercises/tenses/simple_present_mix.htm