The Conditional Question Generator is a simple tool that generates questions based on zero conditionals, first conditionals, second conditionals and third conditionals.
Use this tool if you wish to come up with questions on these topics for your students.
You can copy and paste the questions to use elsewhere, or you can use a projector to show the questions to your class. Or you could even give the link to the students to try.
The link is: http://www.roadtogrammar.com/tools/conditionals/