Dictionary.com
Thesaurus.com

have been perfecting

  • present perfect progressive
    of perfect.
    perfect
    adjective
    matching in every detail the definition of an ideal type of something.

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.

See Examples For:

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

Several Italian producers have been perfecting cricket pasta, pizza and snacks.

From BBC Jul. 8, 2023

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

Traditionally, this is the time of year when Hollywood practices its acceptance speeches; instead many high-profile members of the entertainment industry have been perfecting their apologies.

From Los Angeles Times Dec. 1, 2017

I don't know why we can't make such reds and blues in this country, but of course the old established English firms have been perfecting their formulas and processes throughout the centuries.

From In Jeopardy by Van Tassel Sutphen