Dictionary.com
Thesaurus.com
had been tunnelling
  • past perfect progressive of tunnel.

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.

Luc Pongo Mwamba, provincial director for Congo's artisanal mining agency SAEMAPE, said workers had been tunnelling underground at the mine near the provincial capital Tshikapa when Tuesday's accident occurred.

From Reuters • Jun. 9, 2022

It passed over and through dark and awful chasms, that the river, as it came down from the Alps, had been tunnelling for thousands of years.

From Zigzag Journeys in Northern Lands; The Rhine to the Arctic; A Summer Trip of the Zigzag Club Through Holland, Germany, Denmark, Norway, and Sweden by Butterworth, Hezekiah