Conditionals

Conditional sentences

Type 0: Zero Conditional: certainty
An iron bar expands if/when you heat it.
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Type 1: First Conditional: real possibility
If you do that again, I’ll leave.
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Type 2: Second Conditional: unreal possibility or dream
I would tell you the answer if I knew it. / If I were you, I wouldn’t do that again.
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Type 3: Third Conditional: no possibility
I would have told you the answer if I had known it.
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