collaborate
verb (used without object)
to work, one with another; cooperate, as on a literary work.
had been collaborating
-
past perfect progressiveof collaborate.past perfect progressive
Used to describe an action that was ongoing continuously in the past up until another past event interrupted it.
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.
OpenAI global policy chief Chris Lehane said on Tuesday that the company had been collaborating on AI safety issues with Anthropic and Google DeepMind for several weeks.
From MarketWatch ● Sep. 19, 2026
He had been collaborating on "Global Warning" at the Jeu de Paume exhibition space in Paris, which will run until May 24, until his health deteriorated suddenly following a diagnosis for blood cancer.
From Barron's ● Jan. 30, 2026
Even before leaving L.A., she had been collaborating with the Berlin-based art collective Cheap, and once she was in Europe, American institutions suddenly began to take her more seriously.
From Los Angeles Times ● Dec. 9, 2025
The two sides had been collaborating since early 2024 on the chip, but discussions for a deal accelerated after the Nvidia announcement.
From The Wall Street Journal ● Oct. 21, 2025
On leaving Galway, where he and Mr. Yeats had been collaborating at Coole, Mr. Moore began the second act in French.
From Irish Plays and Playwrights by Cornelius Weygandt
