English verb conjugation
COULD SOLFA

Regular verb: solfa - solfaed - solfaed

Affirmation

Simple form	V-ing form
I could solfa you could solfa he could solfa we could solfa you could solfa they could solfa	I could be solfaing you could be solfaing he could be solfaing we could be solfaing you could be solfaing they could be solfaing
Perfect	V-ing perfect
I could have solfaed you could have solfaed he could have solfaed we could have solfaed you could have solfaed they could have solfaed	I could have been solfaing you could have been solfaing he could have been solfaing we could have been solfaing you could have been solfaing they could have been solfaing

Negation

Simple form	V-ing form
I couldn't solfa you couldn't solfa he couldn't solfa we couldn't solfa you couldn't solfa they couldn't solfa	I couldn't be solfaing you couldn't be solfaing he couldn't be solfaing we couldn't be solfaing you couldn't be solfaing they couldn't be solfaing
Perfect	V-ing perfect
I couldn't have solfaed you couldn't have solfaed he couldn't have solfaed we couldn't have solfaed you couldn't have solfaed they couldn't have solfaed	I couldn't have been solfaing you couldn't have been solfaing he couldn't have been solfaing we couldn't have been solfaing you couldn't have been solfaing they couldn't have been solfaing

Interrogative form

Simple form	V-ing form
could I solfa? could you solfa? could he solfa? could we solfa? could you solfa? could they solfa?	could I be solfaing? could you be solfaing? could he be solfaing? could we be solfaing? could you be solfaing? could they be solfaing?
Perfect	V-ing perfect
could I have solfaed? could you have solfaed? could he have solfaed? could we have solfaed? could you have solfaed? could they have solfaed?	could I have been solfaing? could you have been solfaing? could he have been solfaing? could we have been solfaing? could you have been solfaing? could they have been solfaing?

Interro-negative form

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