The Conditional Sentences ( If clause )

Dalam bahasa Indonesia, the conditional sentence adalah kalimat pengandaian. 

The conditional sentences have three type, it used for drawing the conditional, if can be put in the beginning sentence or after comma ( Kalimat pengandaian memiliki tiga tipe, itu digunakan untuk menggambarkan pengandaian, if bisa diletakkan pada awal kalimat atau setelah koma )

Type III ( Impossible Condition ) ( Pengandaian yang Mustahil Terjadi )

The type III is the conditional sentences that impossible happen, the event or activity happen in the past ( Tipe III adalah kalimat pengandaian yang mustahil terjadi, peristiwa atau kegiatan terjadi di waktu lampau )

Formula

the real uses simple past tense so the conditional uses past perfect tense and the real uses the positive sentence so the conditional uses the negative sentence and vice versa ( Kenyataan menggunakan simple past tense maka pengandaian menggunakan past perfect tense dan kenyataan menggunakan kalimat positif maka pengandaian menggunakan kalimat negatif dan begitu pula sebaliknya )
If + Subject + Past Perfect Tense ( positive or negative ), Subject + modal ( shall / will / can / may / must ) ( positive or negative ) + have

Example

@ I was at home because tomorrow was holiday ( the real )
@ If tomorrow hadn't been holiday, i wouldn't have been at home ( the conditional )
@ I wasn't at home because tomorrow wasn't holiday ( the real )
@ If tomorrow had been holiday, i would have been at home ( the conditional )