had been researching
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past perfect progressiveof research.past perfect progressive
Used to describe an action that was ongoing continuously in the past up until another past event interrupted it.
researchnoundiligent and systematic inquiry or investigation into a subject in order to discover or revise facts, theories, applications, etc..
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Hokema learned his sister was pregnant one month before his death, and had been researching how to set up a college fund for his future niece, Sharkody told The Seattle Times in January.
From Seattle Times ● May 29, 2024
Meanwhile, in Rome, Italian neurologist Ugo Cerletti had been researching epilepsy by electrically inducing seizures in dogs.
From Salon ● Sep. 4, 2023
Walker was an avid hiker and had been researching lost water features and trails, according to Domenica Megerdichian, the South Pasadena deputy city manager.
From Los Angeles Times ● Jul. 27, 2023
She worried about where to store her milk supply and had been researching some storage strategies on TikTok.
From New York Times ● Jan. 18, 2023
Jamie glanced at the newspapers I had been researching.
From "From the Mixed-Up Files of Mrs. Basil E. Frankweiler" by E.L. Konigsburg
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