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 must not solfa
you must not solfa
she must not solfa
we must not solfa
you must not solfa
they must not solfa 	I must not be solfaing
you must not be solfaing
she must not be solfaing
we must not be solfaing
you must not be solfaing
they must not be solfaing	I must not have solfaed
you must not have solfaed
she must not have solfaed
we must not have solfaed
you must not have solfaed
they must not have solfaed	I must not have been solfaing
you must not have been solfaing
she must not have been solfaing
we must not have been solfaing
you must not have been solfaing
they must not 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 	
must I not solfa?
must you not solfa?
must she not solfa?
must we not solfa?
must you not solfa?
must they not solfa? 	must I not be solfaing?
must you not be solfaing?
must she not be solfaing?
must we not be solfaing?
must you not be solfaing?
must they not be solfaing? 	must I not have solfaed?
must you not have solfaed?
must she not have solfaed?
must we not have solfaed?
must you not have solfaed?
must they not have solfaed? 	must I not have been solfaing?
must you not have been solfaing?
must she not have been solfaing?
must we not have been solfaing?
must you not have been solfaing?
must they not have been solfaing?