1. But if it is sunny, I will go swimming with you.
2. What will you do if you win the lottery next week? If I do, I will buy that motorbike.
3. If you can visit any planet in the solar system, which one will you like to go to?
4. If global warming continues, there will be flooding in many parts of the world.
5. I will panic, if I see an alien. I think I will run away as fast as possible.