ZERO CONDITIONAL What is zero conditional? Zero conditional is a structure used to talk about general truths, that is, things that always happen conditions. under certain given What’s its structure? A zero conditional sentence is made of two clauses: a main clause and an ‘if’ clause. Both clauses use the present simple tense. The order of the clauses doesn’t change the meaning of the sentence When the ‘if’ clause goes first, you use a comma between the clauses. When the main clause goes first, there’s no need of a comma. Look at the examples: 'if' clause main clause If you heat water at 100 degrees, it boils. main clause 'if' clause Water boils if you heat it at 100 degrees. Note: * You can change ‘if’ for ‘when’ and ‘as soon as’ * To say ‘if not’, you can use ‘unless’ Exercises Match the clauses from both columns to create zero conditional sentences.