Past Perfect Continuous form

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

Past Perfect Continuous Tense is built with had been in all persons and present participle.

  Affirmative sentences contractions
I / You / He / She / It / We / They I / You / He / She / It / We / They had been writing a letter. I'd been writing a letter.
  Negative sentences contractions
I / You / He / She / It / We / They I / You / He / She / It / We / They had not been writing a letter. I hadn't been writing a letter.
  Questions
I / You / He / She / It / We / They Had I / you / he / she / it / we / they been writing a letter?
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