Zero
If you (freeze) the water, it (turn) into ice.
If you freeze the water, it turns into ice.
If I (pass) the exam, my mum (buy) me a new phone
If I pass the exam, my mum will buy me a new phone
If I (win) a lottery, I (buy) a big, expensive house.
If I won a lottery, I would buy a big, expensive house.
If you (not/eat), you (feel) hungry
If you don't eat, you feel hungry
When you (be) sick, you (feel) bad
When you are sick, you feel bad
If he (call) me, I (be) happy
If he calls me, I will be happy
If she (have) more money, she (travel) more
If she had more money, she would travel more
If I (have) a chance, I (become) a wizard
If I had a chance, I would become a wizard
If you (press) this button, the computer (turn) on.
If you press this button, the computer turns on.
If she (not/study) hard, she (fail) the exam
If she doesn't study hard, she will fail the exam
They (be) surprised, If they (see) a President.
They would be surprised, If they saw a President.
If you (train) more, you (win) a match
If you train more, you will win a match
When you (not/water) plants, they (die)
When you don't water plants, they die)
If she (have) time, she (help) you
If she has time, she will help you
If I (be) you, I (do) more sports
If I were you, I would do more sports
If I (be) you, I (not/go) out at night.
If I were you, I wouldn't go out at night.