If i have lunch, i won't be hungry now

If I had had lunch, I wouldn't have felt hungry now

The car breaks down so often because you don't take good cars of it.
--> Were you to take good care of the car, it wouldn't break down so often.
He is very bad - tempered, that's why his wife left him soon after marriage.
--> If he weren't very bad - tempered, his wife wouldn't leave him soon after marriage.
Don't tell lies to your boss or you'll be fired at once.
--> If you told lies to your boss, you'll be fired at once.
She got married at such an early age: otherwise, she would be at university now.
--> Had she gotten married at such an early age: otherwise, she wouldn't be at university now.
I didn't eat lunch, I feel hungry now.
--> If I had eaten lunch, I wouldn't feel hungry now.
If you want my advice, I wouldn't buy it.
--> If I buy it, you wuoldn't want my advice.
Only come if they invite me.
--> Unless they invite me, I would come.
He didn't revise all his lessons, he failed the exam.
--> If he had revised all his lessons, he wouldn't have failed the exam.
Leave me alone or I'll call the police.
--> Unless you left me alone, I will call the police.

Exercise 10:
1. a will reduce --> reduce
2. d will --> won't
4. a am --> were
6. c ran --> had ran
7. b you would do --> would you do
8. b is not --> wasn't
9. b were flooded --> were flood
10. b will go --> would go