Conditionals usage

What structure do we use to speak about regrets and wishes about present or future?

[ would have V3 ] (if had V3)

Where do we use WOULD?

[ present simple ] ( if / when present simple )

We use this type to speak about facts, laws, something that is always true

What structure do we use to speak about regrets and wishes about past?

[ future simple ] (if present simple )

We use this type to speak about unreal past, to say what could have happened

[ would + V1 ] (if past simple)

We use this type to speak about impossible, unrealistic events in present or future

We use this type to speak about possible situations in present or future

Where to we use WILL?