If you ... ice, it ... (heat, melt)
If you heat ice, it melts.
If you ... the exam, you ... the class. (not pass, fail)
If you don't pass the exam, you fail the class.
If you (eating/eat) too much chocolate, you feel sick
eat
If you ... in the rain, you ... wet. (stand, get)
If you stand in the rain, you get wet.
If you ..., you ... the teacher. (not understand, ask)
If you don't understand, you ask the teacher.
If it (rained/rains), people use umbrellas.
rains
If I ... hungry, I ... out to eat. (be, go)
If I am hungry, I go out to eat.
You ... allowed to drive a car, until you ... a driving licence. (not be, have)
You are not allowed to drive a car, until you have a driving licence.
If you (break/broke/breaks)glass, it shatters.
break
You .... in bed if you ... sick. (should stay, feel)
You should stay in bed if you feel sick.
You ... Peter if you ... sure what to do. (ask, not be)
You ask Peter if you're not sure what to do.
If you (uses/use/used) your phone during class, the teacher takes it away.
use
I... awful if I... at 6 o`clock.
(feel, wake up)
If I wake up at 6 o’clock, I feel awful
When you ... the test, you ... allowed to use a calculator.
(take, not be)
When you take the test, you are not allowed to use a calculator.
If the printer (ran out/ run out/ runs out) paper, it stops working.
runs out