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will have been operating

  • future perfect progressive
    of operate.
    operate
    verb (used without object)
    to work, perform, or function, as a machine does.

Example Sentences

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Ministers say that action taken by the UK and its allies has forced around 200 ships off the seas, most of which will have been operating without a legitimate flag.

From BBC Jan. 11, 2026

In most cases, however, the former method will have to be used, as the turbine generally will have been operating in parallel with one or more other generators.

From Steam Turbines A Book of Instruction for the Adjustment and Operation of the Principal Types of this Class of Prime Movers by Hubert E. (Hubert Edwin) Collins