must backfire
Verbo regolare: backfire - backfired- backfired

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I must backfire
you must backfire
he must backfire
we must backfire
you must backfire
they must backfire 	I must be backfiring
you must be backfiring
he must be backfiring
we must be backfiring
you must be backfiring
they must be backfiring	I must have backfired
you must have backfired
he must have backfired
we must have backfired
you must have backfired
they must have backfired	I must have been backfiring
you must have been backfiring
he must have been backfiring
we must have been backfiring
you must have been backfiring
they must have been backfiring	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I mustn't backfire
you mustn't backfire
he mustn't backfire
we mustn't backfire
you mustn't backfire
they mustn't backfire 	I mustn't be backfiring
you mustn't be backfiring
he mustn't be backfiring
we mustn't be backfiring
you mustn't be backfiring
they mustn't be backfiring	I mustn't have backfired
you mustn't have backfired
he mustn't have backfired
we mustn't have backfired
you mustn't have backfired
they mustn't have backfired	I mustn't have been backfiring
you mustn't have been backfiring
he mustn't have been backfiring
we mustn't have been backfiring
you mustn't have been backfiring
they mustn't have been backfiring	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
must I backfire?
must you backfire?
must he backfire?
must we backfire?
must you backfire?
must they backfire? 	must I be backfiring?
must you be backfiring?
must he be backfiring?
must we be backfiring?
must you be backfiring?
must they be backfiring? 	must I have backfired?
must you have backfired?
must he have backfired?
must we have backfired?
must you have backfired?
must they have backfired? 	must I have been backfiring?
must you have been backfiring?
must he have been backfiring?
must we have been backfiring?
must you have been backfiring?
must they have been backfiring? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
mustn't I backfire?
mustn't you backfire?
mustn't he backfire?
mustn't we backfire?
mustn't you backfire?
mustn't they backfire? 	mustn't I be backfiring?
mustn't you be backfiring?
mustn't he be backfiring?
mustn't we be backfiring?
mustn't you be backfiring?
mustn't they be backfiring? 	mustn't I have backfired?
mustn't you have backfired?
mustn't he have backfired?
mustn't we have backfired?
mustn't you have backfired?
mustn't they have backfired? 	mustn't I have been backfiring?
mustn't you have been backfiring?
mustn't he have been backfiring?
mustn't we have been backfiring?
mustn't you have been backfiring?
mustn't they have been backfiring?