Your taskFill in the gap in each sentence with the correct word or phrase.had been workinghad been chantinghad been researchinghad been workinghad been livinghad been smoulderinghad been workinghad been operatinghad been studyinghad been raininghad been arguinghad been picketinghad been reportinghad been waitinghad been living0 / 15 answeredYour score0 / 150%Keep practising! Focus on the explanations below.1By the time she retired, she for the company for over 30 years. (work)Correct answer: had been working▸ Why?"By the time" + "for over 30 years" frames an activity stretching up to a past moment → PPC. Past simple "worked" would close the time off as a finished period and lose the still-going feel at retirement.2When the police arrived, the protesters peacefully outside the embassy for several hours. (chant)Correct answer: had been chanting▸ Why?A specific past anchor ("when the police arrived") + duration ("for several hours") → PPC. Past continuous would only place the chanting at the moment of arrival, losing the long stretch before it.3By 2020, the team on the new vaccine since 2015. (research)Correct answer: had been researching▸ Why?A past time anchor ("by 2020") + a starting point ("since 2015") → PPC, which captures the unbroken stretch of work up to that moment. Past perfect simple would suggest a finished total.4He was finally promoted in March, but he in the same role for eight years. (work)Correct answer: had been working▸ Why?Duration leading up to a past pivot point (the promotion) → PPC. "Worked" would treat the eight years as a closed chapter; PPC keeps the long, unbroken stretch live as the context for the promotion.5When I first met them at the wedding, the couple together for nearly a decade. (live)Correct answer: had been living▸ Why?A duration stretching up to a specific past introduction → PPC. Past continuous would mark only the moment of meeting, not the ten-year stretch leading up to it.6By the time the alarm finally went off, the fire in the basement for hours. (smoulder)Correct answer: had been smouldering▸ Why?A past anchor ("by the time") + a long duration ("for hours") → PPC. Past simple would close the action; past continuous would lose the pre-alarm stretch that explains how the fire reached that point.7By the time the film won the award, the director on it since 2009. (work)Correct answer: had been working▸ Why?A starting point ("since 2009") + a past achievement ("won the award") → PPC, which keeps the long stretch of work alive at the moment of the win. Past perfect simple would imply the work was over.8When the surgery finally ended, the team for over twelve hours straight. (operate)Correct answer: had been operating▸ Why?Duration "for over twelve hours straight" up to the past endpoint → PPC. Past simple would lose the running-up-to feel; past continuous would lose the duration anchor.9By her thirtieth birthday, Sara ballet seriously for more than twenty years. (study)Correct answer: had been studying▸ Why?A past milestone ("by her thirtieth birthday") + a duration → PPC. Past perfect simple "had studied" would suggest a finished course of training; PPC keeps it live as an ongoing pursuit at the milestone.10The river had risen dramatically by Friday — it heavily since the previous Tuesday. (rain)Correct answer: had been raining▸ Why?"Since the previous Tuesday" up to a past observation ("by Friday") → PPC. Past continuous would only show rain at one moment; PPC stretches the activity across the whole week.11By the time the negotiators reached an agreement, they for nearly forty hours without a break. (argue)Correct answer: had been arguing▸ Why?A past pivot point ("reached an agreement") + a long duration → PPC. Past perfect simple would lose the sense of continuous, exhausting back-and-forth that the 40-hour figure depends on.12When the strike was finally called off, the workers outside the factory gates for six weeks. (picket)Correct answer: had been picketing▸ Why?Duration "for six weeks" leading up to a past endpoint → PPC. Past simple would just record an event; PPC captures the sustained, day-after-day picture that frames the strike's ending.13By the time of the audit, the firm the fraudulent losses as goodwill for three consecutive quarters. (report)Correct answer: had been reporting▸ Why?"By the time of the audit" + duration "for three consecutive quarters" → PPC, which keeps the pattern of misreporting active right up to the discovery. Past perfect simple would close the practice off as already finished.14When the plane finally took off, passengers on the tarmac for over five hours. (wait)Correct answer: had been waiting▸ Why?A past pivot ("finally took off") + a long duration → PPC. Past continuous would only describe the moment of takeoff; PPC stretches the waiting across the whole five-hour ordeal.15By her ninetieth birthday, my grandmother in the same flat since 1953. (live)Correct answer: had been living▸ Why?A past milestone + "since 1953" → PPC, capturing the unbroken span of residence up to that moment. Past perfect simple would suggest the residence was over by her birthday, which contradicts the celebration setting.Check AnswersPlease answer at least one question first.Found an error in this exercise? Let us know.