Past perfect tense
Rumus:
(+) Subject + Had + Been + Verb 3 + by + Object
(-) Subject + Had + Not + Been + Verb 3 + by + Object
Contoh:
(+) Many bicycle had been repaired by those mechanics
(-) Many bicycle had not been repaired by those mechanics
Itulah pengertian, rumus, hingga contoh kalimat active dan passive voice. Semoga bermanfaat.