Put the verbs in the correct form.
  1. She will visit us if she (come) to Europe.
  2. They (learn) English if they stayed in London for some years.
  3. If she were rich, she (fly) to the USA.
  4. If the weather is fine, we (go) for a walk.
  5. They would sing a birthday song if they (know) one.
  6. I would learn for the test if I (be) you.
  7. If she (have) time, she would certainly help you.
  8. If our mother were ill, we (prepare) our meal ourselves.
  9. If Sally gets a letter, she (write) one, too.
  10. If Janet were more beautiful, she (become) a film star.