NastasiyaBgr If I learn hard math, I'll pass my exams
I will give you advice, if you need it
What will you eat, if we go to a restaurant? 
К колонке 2:
They would be rich, if they sold their house
If I won a lottery, I would be wery happy
He would buy a car, if he won a lottery 
Would she go to a party, if he invited her?
к 3ей:
If he hadn't overslept, he wouldn't have missed a bus
If he hadn't missed a bus, he wouldn't have late for school
If he hadn't been late for school, he wouldn't have made teacher angry