- present perfect progressive of observe.
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.
"Weather satellites have been observing the ocean surface for years," said Lenain.
From Science Daily • Apr. 22, 2026
Records show that humans have been observing the red monster for millenia, and have even noticed its change in brightness over that time.
From Space Scoop • Aug. 20, 2025
For more than a decade, scientists have been observing corals that have survived bleaching, even when others have died on the same reef.
From Seattle Times • Dec. 8, 2021
Lira and her colleagues have been observing the relationship between caregivers of children with Zika and biomedical scientists in Recife.
From Salon • Oct. 17, 2021
Yes, I have been observing them all day.
From The Pony Rider Boys in the Alkali or, Finding a Key to the Desert Maze by Patchin, Frank Gee