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have been overrunning

  • present perfect progressive
    of overrun.
    overrun
    verb (used with object)
    to rove over (a country, region, etc.); invade; ravage.

Example Sentences

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Officials stressed that Obama still had not authorised air strikes against Sunni militants who have been overrunning territory in other parts of the country.

From The Guardian ● Jun. 28, 2014