Action in which you reserve something for the future.
SAVE
if you (sweep/sleep), you (wake up/rest).
if you sleep, you rest.
If you (don't have / won't have) enough money, (don't spend / won't spend) it all on clothes.
If you don't have enough money, don't spend it all on clothes.
If the weather (be) fine tomorrow, we (go) cycling
If the weather is fine tomorrow, we will go cycling
If I (won't /don't) go to the class, I (won't / don't) understand the exam.
If I don't go to the class, I won't understand the exam.
Money you give to the government
Taxes
if you (freeze/froze) water, you (get/does) ice.
if you freeze water, you get ice.
You (won't be / can't be) healthy if you (don't drink / won't drink) enough water.
You can't be healthy if you don't drink enough water,
If I (save) enough money, I (go) to the beach.
If I save enough money, I will go to the beach.
I (won't / don't) eat early if I (won't / don't) cook now.
I won't eat early if I don't cook now.
Be paid (money or other payment) in return for work or service
Earn
If you (light/heat water up to 100°, (you/ it) boils.
If you heat water up to 100°, it boils.
If you (don't want / won't want) to be late, (don't stay up / won't stay up) late watching series.
If you don't want to be late, don't stay up late watching series.
If the plane (be) delayed, she (be) late.
If the plane is delayed, she will be late.
If we (won't / don't) take care of the water, we (won't /don't) have any water to cultivate vegetables and fruits.
If we don't take care of the water, we won't have any water to cultivate vegetables and fruits.
Give someone money that they have to return in the future.
Lend
if it (rain) much, don´t d_ _ _ _ (verb similar to use) the car.
if it rains much, don't drive the car.
If in Norway people (don't wear / won't wear) coats in winter, they (won't survive / don't survive).
If in Norway people don't wear coats in winter, they don't survive.
If my family (buy) the land, we (build) a house.
If my family buys the land, we will build a house.
His wife (won't / doesn't) be angry if he (won't / doesn't) forget give her a present for them wedding anniversary.
His wife won't be angry if he doesn't forget give her a present for them wedding anniversary.
Receive money that you have to return in the future
Borrow
if you (studies/study) for the exam, you (pass/approve) the subject.
If you study for the exam, you pass the subject.
You (don't find / won't find) things quickly if you (won't tidy / don't tidy) your room.
You don't find things quickly if you don't tidy your room.
Your sister will go mad, if you touch her things.
Christina (won't / doesn't) drive the car if she (will / does) drink beer.
Christina won't drive the car if she does drink beer.