could backfire
Verbe régulier : backfire - backfired- backfired
Traduction française : pétarader - avoir un effet inattendu 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could backfire
you could backfire
he could backfire
we could backfire
you could backfire
they could backfire 	I could be backfiring
you could be backfiring
he could be backfiring
we could be backfiring
you could be backfiring
they could be backfiring	I could have backfired
you could have backfired
he could have backfired
we could have backfired
you could have backfired
they could have backfired	I could have been backfiring
you could have been backfiring
he could have been backfiring
we could have been backfiring
you could have been backfiring
they could have been backfiring	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't backfire
you couldn't backfire
he couldn't backfire
we couldn't backfire
you couldn't backfire
they couldn't backfire 	I couldn't be backfiring
you couldn't be backfiring
he couldn't be backfiring
we couldn't be backfiring
you couldn't be backfiring
they couldn't be backfiring	I couldn't have backfired
you couldn't have backfired
he couldn't have backfired
we couldn't have backfired
you couldn't have backfired
they couldn't have backfired	I couldn't have been backfiring
you couldn't have been backfiring
he couldn't have been backfiring
we couldn't have been backfiring
you couldn't have been backfiring
they couldn't have been backfiring	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I backfire?
could you backfire?
could he backfire?
could we backfire?
could you backfire?
could they backfire? 	could I be backfiring?
could you be backfiring?
could he be backfiring?
could we be backfiring?
could you be backfiring?
could they be backfiring? 	could I have backfired?
could you have backfired?
could he have backfired?
could we have backfired?
could you have backfired?
could they have backfired? 	could I have been backfiring?
could you have been backfiring?
could he have been backfiring?
could we have been backfiring?
could you have been backfiring?
could they have been backfiring? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I backfire?
couldn't you backfire?
couldn't he backfire?
couldn't we backfire?
couldn't you backfire?
couldn't they backfire? 	couldn't I be backfiring?
couldn't you be backfiring?
couldn't he be backfiring?
couldn't we be backfiring?
couldn't you be backfiring?
couldn't they be backfiring? 	couldn't I have backfired?
couldn't you have backfired?
couldn't he have backfired?
couldn't we have backfired?
couldn't you have backfired?
couldn't they have backfired? 	couldn't I have been backfiring?
couldn't you have been backfiring?
couldn't he have been backfiring?
couldn't we have been backfiring?
couldn't you have been backfiring?
couldn't they have been backfiring?