If you are interested in doing some exercises on Conditional sentences, you will find these pages useful (and that is a real possibility). 

If you were too good at this, you wouldn't need any practice (which would be an unreal present possibility). 

So, for the 1^st Conditional click:

http://www.ego4u.com/en/cram-up/grammar/conditional-sentences/type-1/exercises

http://www.ego4u.com/en/cram-up/grammar/conditional-sentences/type-1/exercises?02

...and for the 2^nd Conditional click:

http://www.ego4u.com/en/cram-up/grammar/conditional-sentences/type-2/exercises

http://www.ego4u.com/en/cram-up/grammar/conditional-sentences/type-2/exercises?02