Past Perfect form

Grammar Past Perfect diagram
Past Perfect form
Past Perfect use
Past Perfect signal words
Exercises Past Perfect

Past Perfect Tense is built with had in all persons and past participle.
Past participle = the third form of irregular verbs, or the infinitve of a verb + -d, -ed.

  Affirmative Contractions
I / You / He / She / It / We / They I / You / He / She / It / We / They had written a letter. I / You / He / She / It / We / They'd written a letter.
  Negative contractions
I / You / He / She / It / We / They I / You / He / She / It / We / They had not written a letter. I / You / He / She / It / We / They hadn't written a letter.
  Questions
I / You / He / She / It / We / They Had I / You / He / She / It / We / They written a letter?