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 mustn't solfa you mustn't solfa he 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 he mustn't be solfaing we mustn't be solfaing you mustn't be solfaing they mustn't be solfaing
Perfect	V-ing perfect
I mustn't have solfaed you mustn't have solfaed he 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 he 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
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
mustn't I solfa? mustn't you solfa? mustn't he 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 he be solfaing? mustn't we be solfaing? mustn't you be solfaing? mustn't they be solfaing?
Perfect	V-ing perfect
mustn't I have solfaed? mustn't you have solfaed? mustn't he 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 he have been solfaing? mustn't we have been solfaing? mustn't you have been solfaing? mustn't they have been solfaing?