English verb conjugation
MUST SOLFA

Regular verb: solfa - solfaed - solfaed

Affirmation

Simple form	V-ing form
I must solfa you must solfa he must solfa we must solfa you must solfa they must solfa	I must be solfaing you must be solfaing he must be solfaing we must be solfaing you must be solfaing they must be solfaing
Perfect	V-ing perfect
I must have solfaed you must have solfaed he 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 he 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
I must not solfa you must not solfa he 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 he must not be solfaing we must not be solfaing you must not be solfaing they must not be solfaing
Perfect	V-ing perfect
I must not have solfaed you must not have solfaed he 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 he 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
must I solfa? must you solfa? must he solfa? must we solfa? must you solfa? must they solfa?	must I be solfaing? must you be solfaing? must he be solfaing? must we be solfaing? must you be solfaing? must they be solfaing?
Perfect	V-ing perfect
must I have solfaed? must you have solfaed? must he 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 he 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
must I not solfa? must you not solfa? must he 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 he not be solfaing? must we not be solfaing? must you not be solfaing? must they not be solfaing?
Perfect	V-ing perfect
must I not have solfaed? must you not have solfaed? must he 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 he not have been solfaing? must we not have been solfaing? must you not have been solfaing? must they not have been solfaing?