Conditionals

General truths and facts: If/When + present, present

Real/likely future results: If + present, will + base verb

Unreal or unlikely present/future results: If + past, would + base

Conditional alternatives emphasizing conditions and requirements

Using 'unless' as a negative conditional meaning 'if not'

Unreal past results: If + past perfect, would have + V3

Combining different time frames: past condition → present result or present condition → past result