Conditional sentence (Zero Conditional)

• We use the so-called Zero Conditional when the result of the condition is always true, like a scientific fact.

If Present Simple, Present Simple or
Present Simple, If Present Simple,

1. If you heat ice, it melts.
2. If I miss the 7 o'clock bus, I am late for work.
3. If I am late for work, my boss gets angry.
4. If people don't eat, they get hungry.