34. Zero Conditional

Used for general truths, scientific facts, and habits. Things that are ALWAYS true.

If + PRESENT SIMPLE, .... PRESENT SIMPLE.

- "If you heat ice, it melts." (Science). - "If I am late, my boss gets angry." (Habit/Pattern). - "People die if they don't eat." (Fact).

- You can replace "If" with "When" in Zero Conditional without changing the meaning.