3.
If she comes late again, she’ll lose her job.
I’ll let you know if I find out what’s happening.
If we lived in a town, life would be easier.
I’m sure he wouldn’t mind if we arrived early.
We’llphone you if we have time.
If I won the lottery. I ( wil lgive you half the money.
It will be a pity if she married Fred.
If I’m free on Saturday, I will go to the mountains.
She will have a nervous breakdown if she goes on like this.
I know I’ll feel better if I stop smoking.
4:
1. If i knew, would invite
2. would go wasn't
3. said, wouldn't
4. would won, played
5. don't cut, will finish