Structure of zero conditional
|Structure of the 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?|
|The zero conditional - common mistakes|
|Common mistakes||Correct version||Why?|
|If people eat too much, they will get fat.
Water boils when it will reach 100°C.
|If people eat too much, they get fat.
Water boils when it reaches 100°C.
|We use the present simple in both clauses of a zero conditional. We are saying that the condition is always true.|
|If/when you don’t exercise, you get fat.||If and when have the same meaning here. We can also use whenever.|