The rule as a picture, 5 multiple-choice questions, 3 sentences to correct and a short writing task. Free to print and copy for your class or for self-study.
Want the explanation first? Read the First vs Second Conditional lesson
Use the first conditional when the situation is a real possibility: If I win, I'll buy you dinner. Use the second when it's imagined or unlikely: If I won the lottery, I'd buy a house. The choice depends on how real it feels to you.
If I win the match, I'll buy you dinner.
If I won the lottery, I'd buy a house.
Write two sentences about your own life: one with First conditional and one with Second conditional. Then explain the difference to a partner.
Answers will vary. Check that each sentence follows the rule on page 1, or paste them into Clarigram to have them checked.