IV.
2. Should you have any complaints about the product, return it to the shop.
3. Were they to arrive today, there would be nowhere for them to stay.
4. If it hadn't been for Suzanne's help, I wouldn't have finished this book.
5. But for John's lift, I wouldn't be able to visit you.
6. Were it not for Megan's and my email, it would be difficult for us to keep in touch.

V.
1. Should her condition improve, we will inform you immediately.
2. Should Jade get to interview a famous politician, she will ask lots of difficult questions.
3. Were you able to go abroad, where would you go ?
4. Were I to become a vet, I would find putting animals down very difficult.
5. Were all environment pollution to stop today, the world would be much better off.
6. Had the hole in the ozone layer been discovered sooner, fewer people would have got skin cancer.
7. Had I not had such a good E teacher at school, I would have become a teacher.