had been mystifying
- past perfect progressive of mystify.
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.
"How many?" he asks, as if confirmation might suddenly have offered a revelatory explanation for all those aches and pains that had been mystifying him for weeks.
From The Guardian ● Apr. 5, 2013
The forms that had been mystifying the crew of the Catamaran, though of the biped class, were no longer to be regarded as human beings, or even creatures of the earth.
From The Ocean Waifs A Story of Adventure on Land and Sea by Reid, Mayne
