http://www.ego4u.com/en/cram-up/tests/conditional-sentences-1

	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.ego4u.com/en/cram-up/tests/conditional-sentences-2

	Positive	Negative	Question
no differences	I spoke.	I did not speak.	Did I speak?

http://www.ego4u.com/en/cram-up/grammar/conditional-sentences

http://www.ego4u.com/en/cram-up/grammar/conditional-sentences/type-3/exercises
http://www.ego4u.com/en/cram-up/grammar/conditional-sentences/type-3/exercises?02