had been vetting
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past perfect progressiveof vet.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.
For many years, MI5 had been vetting BBC staff.
From BBC ● Jan. 25, 2016
Some of them later came to think, though, that Novak had been vetting them, looking for someone to help with his plan.
From New York Times ● Apr. 10, 2014