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had been breeding

  • past perfect progressive
    of breed.
    breed
    verb (used with object)
    to produce (offspring); procreate; engender.

Example Sentences

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Cardiff Crown Court heard the women had been breeding and selling puppies from their home since 2019.

From BBC Jul. 12, 2023

Simply put, the Countess had been breeding a Gunther bloodline, and when VI is gone, VII will replace him, and so on down the Roman numeral line.

From Salon Feb. 3, 2023

Mr. Howe said he knew that cruise liners had been breeding grounds for Covid-19 in the past, but he’s not concerned this time.

From New York Times Dec. 19, 2021

Mirelis Toro and Juan Carlos González, Karla’s parents, had been breeding the pigs and selling piglets for the equivalent of U.S.

From National Geographic Jan. 27, 2021

He had been breeding peas inside the glass hothouse for about three years.

From "The Gene" by Siddhartha Mukherjee