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have been spawning

  • present perfect progressive
    of spawn.
    spawn
    noun
    the mass of eggs deposited by fishes, amphibians, mollusks, crustaceans, etc.

Example Sentences

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Presidential assassinations have been spawning conspiracy theories since Lincoln.

From Slate Apr. 28, 2026

Since the end of World War II, both sides have been spawning water-development plans at the rate of about two a year.

From Time Magazine Archive