to the park we (to feed) some birds there.
If
they (to go) to the disco they (to listen) to loud music. If I (to go) to the theatre I (to watch) an interesting play.
If you (to study) hard you (to pass) this exam.
If you (to wear) these trousers you (to look) a bit strange.
If you (to play) this composition your guests (be pleased).
If David (to forget) his umbrella I (to give) him mine.
If the sun (to shine) all day we (to go) to the beach.
If he (to have) a temperature he (to see) the doctor.