|0 Conditional / Present Real
||If it rains, the streets get wet. If I'm tired, I go to bed.
||Present + Present
|1st Conditional / Future Real
||If it rains tomorrow, I'll bring my umbrella.
||Present + Future
||Future (real possibility)
|2nd Conditional / Future & Present Unreal
||If I won a million dollars, I would buy a boat. If I were the president, I would lower taxes.
||Past + would/could/might + base form
||Future (unlikely) Present unreal situations
|3rd Conditional / Past Unreal
||If I had gone to the party yesterday, I would have met many people.
||Past Perfect + Perfect Modal
||Past unreal situations
||If I had gone to the party, I would be tired now.
||Past Perfect + would/could/might + base form
||Past condition giving a present result