Dictionary.com
Thesaurus.com
had been tweaking
  • past perfect progressive of tweak.

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.

APOBEC3 can edit the genomes of many viruses, including SARS-CoV-2, and the sheer number of edits indicated that this human protein had been tweaking the monkeypox virus for a long time.

From Scientific American • Jul. 20, 2022

Liman had been tweaking and tinkering, trying to capture the essence of war, going at it so heavily he was still editing less than a month before the film’s release in theaters by Roadside Attractions.

From Los Angeles Times • May 13, 2017

One possible question was Cram's occasionally tender left calf, which had been tweaking him after the Nice race.

From Time Magazine Archive