Type 0. научный факт
If + Present Simple, Present Simple
1 If you put an ice cube into water, it melts.
2 If you mix blue and yellow paints, you get green colour.
3 If temperature is zero, eater freezes.
type 1. реальное условие в будущем
If + Present Simple, will + V (V - verb - глагол)
1 If the weather is good, we will go out tomorrow.
2 If it rains, I won't go to the park.
3 If I meet Paul, I'll give him the letter.