must solfa
Regular verb: solfa - solfaed- solfaed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must solfa
you must solfa
she must solfa
we must solfa
you must solfa
they must solfa 	I must be solfaing
you must be solfaing
she must be solfaing
we must be solfaing
you must be solfaing
they must be solfaing	I must have solfaed
you must have solfaed
she must have solfaed
we must have solfaed
you must have solfaed
they must have solfaed	I must have been solfaing
you must have been solfaing
she must have been solfaing
we must have been solfaing
you must have been solfaing
they must have been solfaing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't solfa
you mustn't solfa
she mustn't solfa
we mustn't solfa
you mustn't solfa
they mustn't solfa 	I mustn't be solfaing
you mustn't be solfaing
she mustn't be solfaing
we mustn't be solfaing
you mustn't be solfaing
they mustn't be solfaing	I mustn't have solfaed
you mustn't have solfaed
she mustn't have solfaed
we mustn't have solfaed
you mustn't have solfaed
they mustn't have solfaed	I mustn't have been solfaing
you mustn't have been solfaing
she mustn't have been solfaing
we mustn't have been solfaing
you mustn't have been solfaing
they mustn't have been solfaing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I solfa?
must you solfa?
must she solfa?
must we solfa?
must you solfa?
must they solfa? 	must I be solfaing?
must you be solfaing?
must she be solfaing?
must we be solfaing?
must you be solfaing?
must they be solfaing? 	must I have solfaed?
must you have solfaed?
must she have solfaed?
must we have solfaed?
must you have solfaed?
must they have solfaed? 	must I have been solfaing?
must you have been solfaing?
must she have been solfaing?
must we have been solfaing?
must you have been solfaing?
must they have been solfaing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I solfa?
mustn't you solfa?
mustn't she solfa?
mustn't we solfa?
mustn't you solfa?
mustn't they solfa? 	mustn't I be solfaing?
mustn't you be solfaing?
mustn't she be solfaing?
mustn't we be solfaing?
mustn't you be solfaing?
mustn't they be solfaing? 	mustn't I have solfaed?
mustn't you have solfaed?
mustn't she have solfaed?
mustn't we have solfaed?
mustn't you have solfaed?
mustn't they have solfaed? 	mustn't I have been solfaing?
mustn't you have been solfaing?
mustn't she have been solfaing?
mustn't we have been solfaing?
mustn't you have been solfaing?
mustn't they have been solfaing?