Zero Conditional (will definitely happen)
If + Present Simple + Present Simple.
If you don't drink water for 6 days, you die.
First Conditional (is possible)
If + Present Simple + modal verb (will,can,could,may) = is used for REAL POSSIBILITIES
When + Present Simple = FUTURE EVENTS which are CERTAIN
If/Unless + Present Simple (without modal) = FUTURE EVENTS which are UNCERTAIN
As soon as = happens immediately
If you read English outside class, you'll improve more quickly.
Second Conditional (is possible on condition)
If + Past Simple + would
If I could live anywhere, I would live in Australia.
Third Conditional (is not possible)
If + Past Perfect + would have + past participle
If I had've studied art, I would've been an art teacher.
OK, now you have learnt about conditionals, what kind of sentences are these?
If this weather keeps up, we'll get more of it.
I would've if I could've but I couldn't so I didn't.
If you don't eat, you don't shit, and if you don't shit, you die.
These are typical Australian expressions that my grandfather used to say when I was a child. Now, there's a little slice of my culture for you!