Peter apologized for not having phoned me earlier.

If they could find out the remedy, the patient wouldn't die.

If John didn't eat so many chips, he wouldn't be fat.

If Mr. Mils were not late every day, he would not lose his job.

If we had a map, we wouldn't get lost.

If I had known your number, I would have rung.

If we had had time, we would have visited the museum.