must spell
Verbo irregular: spell - spelled, spelt- spelled, spelt

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must spell
you must spell
she must spell
we must spell
you must spell
they must spell 	I must be spelling
you must be spelling
she must be spelling
we must be spelling
you must be spelling
they must be spelling	I must have spelled, spelt
you must have spelled, spelt
she must have spelled, spelt
we must have spelled, spelt
you must have spelled, spelt
they must have spelled, spelt	I must have been spelling
you must have been spelling
she must have been spelling
we must have been spelling
you must have been spelling
they must have been spelling	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not spell
you must not spell
she must not spell
we must not spell
you must not spell
they must not spell 	I must not be spelling
you must not be spelling
she must not be spelling
we must not be spelling
you must not be spelling
they must not be spelling	I must not have spelled, spelt
you must not have spelled, spelt
she must not have spelled, spelt
we must not have spelled, spelt
you must not have spelled, spelt
they must not have spelled, spelt	I must not have been spelling
you must not have been spelling
she must not have been spelling
we must not have been spelling
you must not have been spelling
they must not have been spelling	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I spell?
must you spell?
must she spell?
must we spell?
must you spell?
must they spell? 	must I be spelling?
must you be spelling?
must she be spelling?
must we be spelling?
must you be spelling?
must they be spelling? 	must I have spelled, spelt?
must you have spelled, spelt?
must she have spelled, spelt?
must we have spelled, spelt?
must you have spelled, spelt?
must they have spelled, spelt? 	must I have been spelling?
must you have been spelling?
must she have been spelling?
must we have been spelling?
must you have been spelling?
must they have been spelling? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not spell?
must you not spell?
must she not spell?
must we not spell?
must you not spell?
must they not spell? 	must I not be spelling?
must you not be spelling?
must she not be spelling?
must we not be spelling?
must you not be spelling?
must they not be spelling? 	must I not have spelled, spelt?
must you not have spelled, spelt?
must she not have spelled, spelt?
must we not have spelled, spelt?
must you not have spelled, spelt?
must they not have spelled, spelt? 	must I not have been spelling?
must you not have been spelling?
must she not have been spelling?
must we not have been spelling?
must you not have been spelling?
must they not have been spelling?