1. If Tom hadn't done a lot of mistakes, he wouldn't have got a good mark.
2. If Jo hadn't thought about the project before she started ,her work wouldn't have been clear.
3. If I hadn't asked ,you wouldn't have told me.
4. If Selina hadn't worked very hard, she wouldn't have got an A.
5. If James hadn't lost his file, he wouldn't have started the project again.