conditional- mixed conditionals

uses and structures 

Zero conditional use to express true facts and probabilities 

Structure: If + simple present + simple present 

First to express real consequence in the present, cause and effect 

Structure: If + present simple + will + infinitive 

Second to express hypothetical and unreal situation 

Structure: If + past simple + would + infinitive

Third to express unreal situation, remember something in the past 

Structure: If + past perfect + would + have + past participle 

 https://youtu.be/4H3-2sm

present result of past condition: If + past perfect + would + have + infinitive

past result of present or continuing condition: If + simple past + would have + PP