have been smoothing
- present perfect progressive of smooth.
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.
So grunting machines have been smoothing out the hilltop while sighing trucks cart off the telltale debris, including old mattresses, stray belongings and chunks of wall painted that odd turquoise.
From New York Times ● Jul. 30, 2014
