Rewriting modals

Gap-fill exercise
By Nacho Montorio

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!

1. Don't run in the corridor!
2. My father knows how to use a computer.
My father
3. It's a good idea to revise for the exam.