General truths and facts: If/When + present, present
If/When + present simple, present simple
If/When + present simple (neg), present simple
What happens if + present simple?
💡 Both clauses use present simple. 'When' can replace 'if' for things that always happen.
✓If you mix red and blue, you get purple.
✗If you mix red and blue, you will get purple.
Zero conditional uses present in both clauses for facts.
✓When water freezes, it expands.
✗When water freezes, it will expand.
General truths use present, not will.
✓If I eat too much, I feel sick.
✗If I eat too much, I felt sick.
Keep both clauses in present simple.