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in the PONS Dictionary

backfire [ˌbækˈfaɪəɐ, Am -ˈfaɪɚ] VB intr

1. backfire (go wrong):

backfire
име́ть обра́тный эффе́кт
backfire
приводи́ть к обра́тным результа́там
his plans backfired
его́ пла́ны оберну́лись про́тив него́ самого́

2. backfire AUTO:

backfire
обра́тная вспы́шка f
Present
Ibackfire
youbackfire
he/she/itbackfires
webackfire
youbackfire
theybackfire
Past
Ibackfired
youbackfired
he/she/itbackfired
webackfired
youbackfired
theybackfired
Present Perfect
Ihavebackfired
youhavebackfired
he/she/ithasbackfired
wehavebackfired
youhavebackfired
theyhavebackfired
Past Perfect
Ihadbackfired
youhadbackfired
he/she/ithadbackfired
wehadbackfired
youhadbackfired
theyhadbackfired
See further verb tables