have been perfecting
- present perfect progressive of perfect.
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 authors have been perfecting the technology since 2018 and the latest iteration can in principle allow researchers to directly observe any cell-to-cell interaction in vivo.
From Science Daily ● Mar. 6, 2024
But others remain cautious that international recognition could tarnish their beloved sport and force them to relinquish control over the style they have been perfecting for 70 years.
From Seattle Times ● Aug. 7, 2021
Thousands of Disney employees have been perfecting the app’s design and navigation, unfurling marketing initiatives and creating content for the service.
From Los Angeles Times ● Nov. 12, 2019
For decades, companies selling seats on planes have been perfecting the algorithmic arts of revenue management.
From BusinessWeek ● Oct. 30, 2014
Now, for some time the Army engineer officers have been perfecting a system of submarine mines for the bay.
From The Submarine Boys for the Flag Deeding Their Lives to Uncle Sam by Durham, Victor G.
