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have been breeding

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

Example Sentences

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The man may have been breeding and selling pit bulls because investigators found 13 dogs, including eight puppies, in the yard, authorities said.

From Seattle Times ● Feb. 16, 2024

“Humans have been breeding plants for a long time and genetically modifying them more recently,” he says.

From Scientific American ● Mar. 31, 2022

Since the beginning of human agriculture more than 10,000 years ago, human groups have been breeding and selecting crop varieties.

From Textbooks ● Sep. 6, 2018

“The reservoirs behind the dams have been breeding grounds for very toxic blue-green algae, and that has really sickened people,” said Stephen Most, a regional historian.

From New York Times ● Sep. 4, 2018

And what has happened to that milk which should have been breeding up sturdy calves?

From "Animal Farm: A Fairy Story" by George Orwell