must frit
Verbo regular: frit - frited- frited

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must frit
you must frit
he must frit
we must frit
you must frit
they must frit 	I must be friting
you must be friting
he must be friting
we must be friting
you must be friting
they must be friting	I must have frited
you must have frited
he must have frited
we must have frited
you must have frited
they must have frited	I must have been friting
you must have been friting
he must have been friting
we must have been friting
you must have been friting
they must have been friting	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not frit
you must not frit
he must not frit
we must not frit
you must not frit
they must not frit 	I must not be friting
you must not be friting
he must not be friting
we must not be friting
you must not be friting
they must not be friting	I must not have frited
you must not have frited
he must not have frited
we must not have frited
you must not have frited
they must not have frited	I must not have been friting
you must not have been friting
he must not have been friting
we must not have been friting
you must not have been friting
they must not have been friting	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I frit?
must you frit?
must he frit?
must we frit?
must you frit?
must they frit? 	must I be friting?
must you be friting?
must he be friting?
must we be friting?
must you be friting?
must they be friting? 	must I have frited?
must you have frited?
must he have frited?
must we have frited?
must you have frited?
must they have frited? 	must I have been friting?
must you have been friting?
must he have been friting?
must we have been friting?
must you have been friting?
must they have been friting? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not frit?
must you not frit?
must he not frit?
must we not frit?
must you not frit?
must they not frit? 	must I not be friting?
must you not be friting?
must he not be friting?
must we not be friting?
must you not be friting?
must they not be friting? 	must I not have frited?
must you not have frited?
must he not have frited?
must we not have frited?
must you not have frited?
must they not have frited? 	must I not have been friting?
must you not have been friting?
must he not have been friting?
must we not have been friting?
must you not have been friting?
must they not have been friting?