must spell
Irregular verb: spell - spelled, spelt- spelled, spelt

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't spell
you mustn't spell
she mustn't spell
we mustn't spell
you mustn't spell
they mustn't spell 	I mustn't be spelling
you mustn't be spelling
she mustn't be spelling
we mustn't be spelling
you mustn't be spelling
they mustn't be spelling	I mustn't have spelled, spelt
you mustn't have spelled, spelt
she mustn't have spelled, spelt
we mustn't have spelled, spelt
you mustn't have spelled, spelt
they mustn't have spelled, spelt	I mustn't have been spelling
you mustn't have been spelling
she mustn't have been spelling
we mustn't have been spelling
you mustn't have been spelling
they mustn't have been spelling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I spell?
mustn't you spell?
mustn't she spell?
mustn't we spell?
mustn't you spell?
mustn't they spell? 	mustn't I be spelling?
mustn't you be spelling?
mustn't she be spelling?
mustn't we be spelling?
mustn't you be spelling?
mustn't they be spelling? 	mustn't I have spelled, spelt?
mustn't you have spelled, spelt?
mustn't she have spelled, spelt?
mustn't we have spelled, spelt?
mustn't you have spelled, spelt?
mustn't they have spelled, spelt? 	mustn't I have been spelling?
mustn't you have been spelling?
mustn't she have been spelling?
mustn't we have been spelling?
mustn't you have been spelling?
mustn't they have been spelling?