Past perfect | - | LearnEnglish
https://learnenglish.britishcouncil.org/.../past-perfectPast perfect for the earlier of two past actions We can use the past perfect to show the order of two past events. The past perfect shows the earlier action and the past simple shows the later action. When the police arrived, the thief had escaped. It doesn't matter in which order we say the two events. The following sentence has the same meaning.
English Grammar Explanations - Past perfect
esl.fis.edu › grammar › rulesThe past perfect tense is used in unreal or hypothetical stituations, as in the following sentences: If I had known you were in Frankfurt, I would have called you. ( but I didn't know you were here so I didn't call you!) If I had had enough money, I would have bought you a better present. ( but I didn't have enough money.)
English Grammar Explanations - Past perfect
esl.fis.edu/grammar/rules/pastperf.htmEnglish Grammar Explanations - Past perfect The Past Perfect Tense The past perfect tense is most often used for the following: - For actions that happened before a past event - In reported speech - In if (conditional) sentences How to form the past perfect | Past perfect continuous For actions that happened before a past event