1. He smokes too much; that's why he can't get rid of his cough.
-> Were he not to smoke too much, he couldn't get rid of his cough.
2.He doesn't take any execises. He is so unhealthy
-> Were he to take any execises, he wouldn't be so unhealthy.
3.We can't get the ticket because I don't have the right change.
-> Were I to have the right change, we couldn't get the ticket.
4.Study hard or you won't pass the exam.
-> Should you hard study, you will pass the exam.
5.Don't be impatient or you will make mistakes.
-> Should you be impatient, you won't make mistakes.
6.I didn't eat lunch, I feel hungry now.
-> Had I eaten lunch, I wouldn't feel hungry now.
7.I only come if they invite me.
-> Unless they invite me, I won't come.
8.He didn't revise all his lesson, he failed the exam.
-> Had he revised all his lesson, he woulfn't have failed the exam.
9. The park is over there, only 5 minutes walk.
-> If you walk to the park, it will take you only 5 minutes.
10.Leave me alone or I'll call the police.
-> Unless you leave me alone, I'll call the police.
11.The car breaks down so often because you don't take good care of it.
-> Were you to take good care of the car, it wouldn't break down so often.
12.He is very bad-tempered, that's why his wife left him soon after marriage.
-> If he wasn't very bad-tempered, his wife wouldn't have left him soon after marriage.
13.Don't tell lies to your boss or you'll be fired at once.
-> Should you tell lies to your boss, you'll be fired at once.
14.She got married at such an early age: otherwise, she would be at unisersity now.
-> Had she not got married at such an early age, she would be at unisersity now.