had been lengthening
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past perfect progressiveof lengthen.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.
"Tell Jack he must go to town right away, because—well, tell him Bill Wilson—" Valencia's face had been lengthening comically, but hope began to live again in his eyes.
From The Gringos by Anton Otto Fischer
For some time he had been lengthening out his office hours, and increasing his salary, by adding night to day.
From The Judgment of Eve by John Wolcott Adams