has been puzzling
- present perfect progressive of puzzle (3rd person singular).
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.
Why cancer has been increasing in people's late teens, 20s, 30s and 40s has been puzzling scientists for years.
From BBC ● Apr. 28, 2026
Asteroid Phaethon, which is five kilometers in diameter, has been puzzling researchers for a long time.
From Science Daily ● Nov. 28, 2023
The story of how black holes, especially young ones, grow so fast and become so massive, has been puzzling astronomers for a long time.
From Space Scoop ● Aug. 3, 2023
So it has been puzzling to many that success in the lucrative video game business has eluded the tech giant.
From Seattle Times ● Sep. 28, 2021
That is just what has been puzzling me.
From Portia or By Passions Rocked by Duchess
