Talking about facts, rules and things that are always true
We use the zero conditional for things that are always true — facts, rules, and habits. The result always happens.
"If you heat ice, it melts."
"If the fire alarm rings, everyone leaves the building."
"If I wake up early, I go for a run."
Remember: both parts of the sentence use the present simple — never "will".
Tip: we can often use when instead of if, with the same meaning: "When you heat ice, it melts."
Read each sentence about the zero conditional. Is it true or false?
Choose the correct form to complete each sentence.
Put the verb in brackets into the correct form (present simple).
Match each if-clause with the correct result.
Click the words in the correct order to build a complete sentence.
Rewrite each sentence using when instead of if. The meaning stays the same.
Write your own zero conditional sentence for each topic. Check your idea against the model answer.