must backfit
Verbe irrégulier : backfit - backfit, backfitted- backfit, backfitted

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must backfit
you must backfit
she must backfit
we must backfit
you must backfit
they must backfit 	I must be backfiting
you must be backfiting
she 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
she 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
she must have been backfiting
we must have been backfiting
you must have been backfiting
they must have been backfiting	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must not backfit
you must not backfit
she must not backfit
we must not backfit
you must not backfit
they must not backfit 	I must not be backfiting
you must not be backfiting
she must not be backfiting
we must not be backfiting
you must not be backfiting
they must not be backfiting	I must not have backfit, backfitted
you must not have backfit, backfitted
she must not have backfit, backfitted
we must not have backfit, backfitted
you must not have backfit, backfitted
they must not have backfit, backfitted	I must not have been backfiting
you must not have been backfiting
she must not have been backfiting
we must not have been backfiting
you must not have been backfiting
they must not have been backfiting	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I backfit?
must you backfit?
must she backfit?
must we backfit?
must you backfit?
must they backfit? 	must I be backfiting?
must you be backfiting?
must she 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 she 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 she have been backfiting?
must we have been backfiting?
must you have been backfiting?
must they have been backfiting? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I not backfit?
must you not backfit?
must she not backfit?
must we not backfit?
must you not backfit?
must they not backfit? 	must I not be backfiting?
must you not be backfiting?
must she not be backfiting?
must we not be backfiting?
must you not be backfiting?
must they not be backfiting? 	must I not have backfit, backfitted?
must you not have backfit, backfitted?
must she not have backfit, backfitted?
must we not have backfit, backfitted?
must you not have backfit, backfitted?
must they not have backfit, backfitted? 	must I not have been backfiting?
must you not have been backfiting?
must she not have been backfiting?
must we not have been backfiting?
must you not have been backfiting?
must they not have been backfiting?