English verb conjugation
COULD PLAY

Regular verb: play - played - played

Affirmation

Simple form	V-ing form
I could play you could play he could play we could play you could play they could play	I could be playing you could be playing he could be playing we could be playing you could be playing they could be playing
Perfect	V-ing perfect
I could have played you could have played he could have played we could have played you could have played they could have played	I could have been playing you could have been playing he could have been playing we could have been playing you could have been playing they could have been playing

Negation

Simple form	V-ing form
I couldn't play you couldn't play he couldn't play we couldn't play you couldn't play they couldn't play	I couldn't be playing you couldn't be playing he couldn't be playing we couldn't be playing you couldn't be playing they couldn't be playing
Perfect	V-ing perfect
I couldn't have played you couldn't have played he couldn't have played we couldn't have played you couldn't have played they couldn't have played	I couldn't have been playing you couldn't have been playing he couldn't have been playing we couldn't have been playing you couldn't have been playing they couldn't have been playing

Interrogative form

Simple form	V-ing form
could I play? could you play? could he play? could we play? could you play? could they play?	could I be playing? could you be playing? could he be playing? could we be playing? could you be playing? could they be playing?
Perfect	V-ing perfect
could I have played? could you have played? could he have played? could we have played? could you have played? could they have played?	could I have been playing? could you have been playing? could he have been playing? could we have been playing? could you have been playing? could they have been playing?

Interro-negative form

Simple form	V-ing form
couldn't I play? couldn't you play? couldn't he play? couldn't we play? couldn't you play? couldn't they play?	couldn't I be playing? couldn't you be playing? couldn't he be playing? couldn't we be playing? couldn't you be playing? couldn't they be playing?
Perfect	V-ing perfect
couldn't I have played? couldn't you have played? couldn't he have played? couldn't we have played? couldn't you have played? couldn't they have played?	couldn't I have been playing? couldn't you have been playing? couldn't he have been playing? couldn't we have been playing? couldn't you have been playing? couldn't they have been playing?