have been testing
- present perfect progressive of test.
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.
Railroad operators have been testing cleaner alternatives to diesel-powered locomotives, including battery models, but still rely on diesel-electric for almost all freight routes.
From The Wall Street Journal ● Mar. 31, 2026
"These teenagers have been testing me in the last couple of rounds," said Sabalenka, 27, who is on a 10-match win streak after victory in Brisbane this month.
From Barron's ● Jan. 27, 2026
More recently, researchers have been testing GLP-1 receptor agonists in people with obesity.
From Science Daily ● Nov. 16, 2025
But in 2025, a number of factors have been testing businesses like never before.
From MarketWatch ● Nov. 8, 2025
In the rear comes Werner, carrying the pair of transceivers he and Hauptmann have been testing for months.
From "All the Light We Cannot See" by Anthony Doerr
