test
noun
the means by which the presence, quality, or genuineness of anything is determined; a means of trial.
had been testing
-
past perfect progressiveof test.past perfect progressive
Used to describe an action that was ongoing continuously in the past up until another past event interrupted it.
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.
Business Insider previously reported that Google employees had been testing 3.8 Flash.
From The Wall Street Journal ● Sep. 1, 2026
He had been testing a photocatalyst when he removed it during a control experiment and discovered that the reaction worked just as well and sometimes even better without it.
From Science Daily ● Mar. 14, 2026
In the weeks leading up to the fires, Heinrich said, he had been testing a suite of new features for the app, making his house “probably the most 3D-scanned home on Earth.”
From Slate ● Jul. 25, 2025
He posted to X last week that the electric vehicle maker had been testing the Model Y with no drivers on board.
From BBC ● Jun. 6, 2025
He had been testing his and Geisbert’s blood all along, and he wondered if the virus would suddenly show up in it.
From "The Hot Zone" by Richard Preston
