Example: air traffic controller
Verb Forms and Tenses

Verb Forms and Tenses

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present participle verb form ending in –ing. Example: The children have been sleeping. Past perfect progressive The past perfect progressive tense is used to show a past, ongoing event that was completed before another past event. The past perfect progressive tense is formed by using had been with the present perfect verb form ending in -ing.

  Form, Verb, Tenses, Verb forms and tenses

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