Conditionals >> Zero conditional sentences

Structure of zero conditional
If/when you heat water to 100 degrees, it boils.	If/when you don't heat water to 100 degrees, it doesn't boil.	What happens if/when you heat water to 100 degrees?

Zero conditional - common mistakes
Common mistakes	Correct version	Why?
If/when you eat too much, you will get fat. Water boils when it will reach 100°C.	If/when you eat too much, you get fat. Water boils when it reaches 100°C.	We use the present simple in both clauses and it means that the condition can be true at any time (it is a fact). If means the same as when in a zero conditional sentence.

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