The past perfectThe past perfect progressiveandThe past perfect1 ）structure ：subject +had +past participleaffirmative sentence ：subject+ had+ past participle negative sentence ： subject +had+ not+ past participle general question ：Had+ subject + past participlepassive voice ： subject +had （hadnt) been+ past participle2) Past perfect tense time adverbial before, by, until , when, after, once, as soon as 。 He said that he had learned some English before. Tom was disappointed that most of the guest
