Zero conditional:
Rule:
- If + Present Simple, Present Simple
Example:
1. If you heat water, it boils.
First Conditional:
Rule:
- If + Present Simple, Will + Infinitive
Example:
1. If it rains, we will at home.
Second Conditional:
Rule:
- If + Past Simple, Would + Infinitive
Example:
1. If I won the lottery, I would travel the world.
Third Conditional:
Rule:
- If + Past perfect, would have + past participle
Zero Conditional
Form: if+ present simple + main clause with present simple - continous, perfect.
Use: General truth
First conditional
Form: If+ present simple /continous / perfect +main clause with a modal verb.
Use: Describing posibilities in present or future.
Second conditional
Form:if+past simple/continous+main clause with could,should,would,might+ bare infinitive.
Use: Opposite to the present, suggest something hypothetical, giving advise.
Third conditional
if+past perfect +main clause with would, could, might +have +past participle.
