Past Future Perfect Continous Tense

The tense is used for stating an action or event that would have been taking place in the past ( Masa ini digunakan untuk menyatakan peristiwa atau kejadian yang akan sudah sedang terjadi pada waktu lampau )

Formula ( Rumus )

A : Subject + Auxiliary ( would ) + Auxiliary ( have ) + been + Verb 1 + ing + Object + Adverb ( Positive and Active Sentence )
B : Subject + Auxiliary ( would ) + not + Auxiliary ( have ) + been + Verb 1 + ing + Object + Adverb ( Positive and Active Sentence )
C : Auxiliary ( would ) + Subject + Auxiliary ( have ) + been + Verb 1 + ing + Object + Adverb ? ( Introgative, Active and Positive Sentence )
D : Auxiliary ( would ) + Subject + not + Auxiliary ( have ) + been + Verb 1 + ing + Object + Adverb ? ( Introgative, Active and Negative Sentence )

Example

A : I would have been studying English hard, she / he / person name would have been sending letter, you / we / they would have been playing basketball in the yard
B : I wouldn't have been studying English hard, she / he / person name woldn't have been sending letter, you / we / they wouldn't have been playing basketball in the yard
C : Would i have been studying English hard ?, would she / he / person name have been sending letter ?, would you / we / they have been playing basketball in the yard ?
D : Would i not have been studying English hard ?, would she / he / person name not have been sending letter ?, would you / we / they not have been playing basketball in the yard ?