had been detecting
- past perfect progressive of detect.
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.
The center’s tech crews had been detecting frequent hackings of U.S. military computer networks, and had come up with ways to counter them—but few senior officers took notice or cared.
From Slate ● Mar. 7, 2016
