Tolong jelasin secara singkat “Conditional Sntence” Type 3 ,trims..

Suatu kalimat pengandainya yang bertentangan dengan masa lalu.
Contohnya :
If you had said your guilty, I would have forgiven you
If + past perfect, S + would/should + have + past participle

Kalimat pengandaian untuk masa lalu dimana kalimatnya bertentangan
main clouse( s+ would/should+have+v3) if clouse( if+s+had+v3) jika if clouse tidak mempunyai kata kerja maka ditambah have been
contoh : he could have if his computer had not broken down