17. If Shelia had had driven to the restaurant, shw would be here by now.

18. If He had finished the computer course, he could fix it.

19. If soneome had told me about the cinema, i would come with you.

20. Steven could say that was wrong with the computer id fe had looked at it.

21. If i had entered the competition, i would win.

22. Sally could buy a new dress if she had had enough money.

17.If Sheila had driven to the restaurant,she would have been here by now.

18.Peter could have fixed it if he had finished the computer course,

19.If someone had told me about the cinema,I would have come with you.

20.Steven could have said what was wrong with the computer if he had looked at it.

21.If I had enter the competition,I would have won.

22.Sally could have bought the new dress if she had had enough money.