must backfit
Verbo irregular: backfit - backfit, backfitted- backfit, backfitted

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must backfit
you must backfit
he must backfit
we must backfit
you must backfit
they must backfit 	I must be backfiting
you must be backfiting
he must be backfiting
we must be backfiting
you must be backfiting
they must be backfiting	I must have backfit, backfitted
you must have backfit, backfitted
he must have backfit, backfitted
we must have backfit, backfitted
you must have backfit, backfitted
they must have backfit, backfitted	I must have been backfiting
you must have been backfiting
he must have been backfiting
we must have been backfiting
you must have been backfiting
they must have been backfiting	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't backfit
you mustn't backfit
he mustn't backfit
we mustn't backfit
you mustn't backfit
they mustn't backfit 	I mustn't be backfiting
you mustn't be backfiting
he mustn't be backfiting
we mustn't be backfiting
you mustn't be backfiting
they mustn't be backfiting	I mustn't have backfit, backfitted
you mustn't have backfit, backfitted
he mustn't have backfit, backfitted
we mustn't have backfit, backfitted
you mustn't have backfit, backfitted
they mustn't have backfit, backfitted	I mustn't have been backfiting
you mustn't have been backfiting
he mustn't have been backfiting
we mustn't have been backfiting
you mustn't have been backfiting
they mustn't have been backfiting	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I backfit?
must you backfit?
must he backfit?
must we backfit?
must you backfit?
must they backfit? 	must I be backfiting?
must you be backfiting?
must he be backfiting?
must we be backfiting?
must you be backfiting?
must they be backfiting? 	must I have backfit, backfitted?
must you have backfit, backfitted?
must he have backfit, backfitted?
must we have backfit, backfitted?
must you have backfit, backfitted?
must they have backfit, backfitted? 	must I have been backfiting?
must you have been backfiting?
must he have been backfiting?
must we have been backfiting?
must you have been backfiting?
must they have been backfiting? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I backfit?
mustn't you backfit?
mustn't he backfit?
mustn't we backfit?
mustn't you backfit?
mustn't they backfit? 	mustn't I be backfiting?
mustn't you be backfiting?
mustn't he be backfiting?
mustn't we be backfiting?
mustn't you be backfiting?
mustn't they be backfiting? 	mustn't I have backfit, backfitted?
mustn't you have backfit, backfitted?
mustn't he have backfit, backfitted?
mustn't we have backfit, backfitted?
mustn't you have backfit, backfitted?
mustn't they have backfit, backfitted? 	mustn't I have been backfiting?
mustn't you have been backfiting?
mustn't he have been backfiting?
mustn't we have been backfiting?
mustn't you have been backfiting?
mustn't they have been backfiting?