tunnel
noun
an underground passage.
have been tunneling
-
present perfect progressiveof tunnel.present perfect progressive
Used to describe an action that began in the past, has continued continuously, and is still in progress.
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.
Here at the dam site, Chinese workers in orange hard hats have been tunneling, blasting and shoring up riverbanks.
From New York Times ● Sep. 21, 2011
