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had been releasing

  • past perfect progressive
    of release.
    release
    verb (used with object)
    to free from confinement, bondage, obligation, pain, etc.; let go.

Example Sentences

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Prof Hammond requested data on 11 Welsh treatment plants and found that 10 had been releasing untreated sewage at times when they should have been treating it.

From BBC Oct. 18, 2023

The plant had been releasing ethylene oxide from 1985 until it was temporarily shut down by the state in 2019 after authorities detected the gas nearby.

From Seattle Times Sep. 20, 2022

Anderson Reservoir had been releasing as much water as possible through its main outlet since Jan. 9.

From Los Angeles Times Feb. 22, 2017

By the time “Bawitdaba” came out as a single, Kid Rock had been releasing music for almost a decade.

From The New Yorker Aug. 17, 2016

Toward midday a sea-plane which had been releasing depth-bombs and hovering eagerly above the wide iridescent and spreading stain, sheered shoreward and shot along the coast.

From In Secret by Robert W. (Robert William) Chambers