had refined
- past perfect of refine.
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.
Nelligan said that, since 2023, they had refined the science and were preparing to publish an academic paper on groundbreaking body detection methods in soil.
From Los Angeles Times ● May 7, 2026
The concept echoed the cash-and-carry model he had refined in South Africa.
From The Wall Street Journal ● Mar. 30, 2026
They said Turla, the FSB unit believed responsible for the malware, had refined and revised it multiple times as a way to avoid being shut down.
From Seattle Times ● May 9, 2023
Sandwell Council said it had refined its contact tracing service to pick up suspected cases of Omicron early.
From BBC ● Dec. 6, 2021
In England, farm breeders had refined the creation of novel breeds and variants to a highly sophisticated science.
From "The Gene" by Siddhartha Mukherjee
