Past Perfect Simple та Past Perfect Continuous

By the time we arrived at the concert venue, the opening act ____________________ their performance, leaving us eagerly anticipating the main event

The mountaineers ____________________ meticulously for months before attempting to scale the treacherous peak

The author was devastated to learn that her publisher ____________________ excerpts of her upcoming novel without her consent

She ____________________ Japanese intensively for two years before moving to Tokyo for her new job

She realized she ____________________ her passport at home only after reaching the airport check-in counter

The couple ____________________ for hours before they finally decided to seek professional counseling to resolve their issues

The scientist ____________________ groundbreaking research on climate change for decades before receiving international recognition for her work

The team ____________________ the revolutionary software for over a decade before its successful launch

The diplomat ____________________ tirelessly for weeks before finally reaching a compromise between the warring factions

The old car ____________________ strange noises for weeks before it finally broke down on the highway

The athlete ____________________ rigorously for four years leading up to her Olympic debut

The chef ____________________ with various ingredients for months before perfecting his award-winning recipe

By the time the firefighters arrived, the blaze ____________________ most of the historic building's upper floors

When the storm finally subsided, we saw that it ____________________ several ancient oak trees in the park

The artist ____________________ on his masterpiece in seclusion for years before finally unveiling it to the public

The archaeologists were thrilled to discover that ancient civilizations ____________________ the site for centuries before it was abandoned

When the detective arrived at the crime scene, the culprit ____________________, leaving behind crucial evidence

The chef was dismayed to find that someone ____________________ the specially prepared dish he had left in the refrigerator

The company ____________________ market share to its competitors for years before deciding to rebrand and restructure

The detectives ____________________ the mysterious disappearances for months before uncovering a crucial piece of evidence

By the time the rescue team reached the hikers, they ____________________ three days of harsh wilderness conditions

By the time the rain stopped, the river ____________________ steadily for days, threatening to flood the nearby towns

By the time they reached a settlement, the lawyers ____________________ the terms of the agreement for weeks

The company ____________________ heavily in research and development before launching their groundbreaking product