English verb conjugation
COULD MODEL

Regular verb: model - modelled - modelled

Affirmation

Simple form	V-ing form
I could model you could model he could model we could model you could model they could model	I could be modelling you could be modelling he could be modelling we could be modelling you could be modelling they could be modelling
Perfect	V-ing perfect
I could have modelled you could have modelled he could have modelled we could have modelled you could have modelled they could have modelled	I could have been modelling you could have been modelling he could have been modelling we could have been modelling you could have been modelling they could have been modelling

Negation

Simple form	V-ing form
I couldn't model you couldn't model he couldn't model we couldn't model you couldn't model they couldn't model	I couldn't be modelling you couldn't be modelling he couldn't be modelling we couldn't be modelling you couldn't be modelling they couldn't be modelling
Perfect	V-ing perfect
I couldn't have modelled you couldn't have modelled he couldn't have modelled we couldn't have modelled you couldn't have modelled they couldn't have modelled	I couldn't have been modelling you couldn't have been modelling he couldn't have been modelling we couldn't have been modelling you couldn't have been modelling they couldn't have been modelling

Interrogative form

Simple form	V-ing form
could I model? could you model? could he model? could we model? could you model? could they model?	could I be modelling? could you be modelling? could he be modelling? could we be modelling? could you be modelling? could they be modelling?
Perfect	V-ing perfect
could I have modelled? could you have modelled? could he have modelled? could we have modelled? could you have modelled? could they have modelled?	could I have been modelling? could you have been modelling? could he have been modelling? could we have been modelling? could you have been modelling? could they have been modelling?

Interro-negative form

Simple form	V-ing form
couldn't I model? couldn't you model? couldn't he model? couldn't we model? couldn't you model? couldn't they model?	couldn't I be modelling? couldn't you be modelling? couldn't he be modelling? couldn't we be modelling? couldn't you be modelling? couldn't they be modelling?
Perfect	V-ing perfect
couldn't I have modelled? couldn't you have modelled? couldn't he have modelled? couldn't we have modelled? couldn't you have modelled? couldn't they have modelled?	couldn't I have been modelling? couldn't you have been modelling? couldn't he have been modelling? couldn't we have been modelling? couldn't you have been modelling? couldn't they have been modelling?