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забракованному
zeznawać
testify [ˈtestɪfaɪ] VB intr
1. testify (make statement):
testify
zeznawać [perf zeznać]
2. testify form (prove):
to testify to sth
świadczyć [perf za-] o czymś
Present
Itestify
youtestify
he/she/ittestifies
wetestify
youtestify
theytestify
Past
Itestified
youtestified
he/she/ittestified
wetestified
youtestified
theytestified
Present Perfect
Ihavetestified
youhavetestified
he/she/ithastestified
wehavetestified
youhavetestified
theyhavetestified
Past Perfect
Ihadtestified
youhadtestified
he/she/ithadtestified
wehadtestified
youhadtestified
theyhadtestified
PONS OpenDict

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Examples from the PONS Dictionary (editorially verified)
to testify to sth
świadczyć [perf za-] o czymś
Monolingual examples (not verified by PONS Editors)
They testify to the importance of the site as a trading port over the centuries.
en.wikipedia.org
The video features the band in a raucous courtroom filled with spectators and tabloid reporters, testifying by singing the song into the court's witness microphones.
en.wikipedia.org
He summarily testified before an all-white federal grand jury.
en.wikipedia.org
Some victims reportedly testified but were subsequently deported.
en.wikipedia.org
However, she testified, she was unable to talk about her war experiences with her family.
en.wikipedia.org