Q:

Transform the given compound sentence into a complex sentence.
You have to be 18 years old or you cant drive.

• 1
  You cant drive because you are under 18.
• 2
  To drive, you have to be 18 years old.
• 3
  If you are under 18, you cant drive.
• 4
  If you are 18 year old, you cant drive.