English verb conjugation
COULD RACE

Regular verb: race - raced - raced

Affirmation

Simple form	V-ing form
I could race you could race he could race we could race you could race they could race	I could be racing you could be racing he could be racing we could be racing you could be racing they could be racing
Perfect	V-ing perfect
I could have raced you could have raced he could have raced we could have raced you could have raced they could have raced	I could have been racing you could have been racing he could have been racing we could have been racing you could have been racing they could have been racing

Negation

Simple form	V-ing form
I could not race you could not race he could not race we could not race you could not race they could not race	I could not be racing you could not be racing he could not be racing we could not be racing you could not be racing they could not be racing
Perfect	V-ing perfect
I could not have raced you could not have raced he could not have raced we could not have raced you could not have raced they could not have raced	I could not have been racing you could not have been racing he could not have been racing we could not have been racing you could not have been racing they could not have been racing

Interrogative form

Simple form	V-ing form
could I race? could you race? could he race? could we race? could you race? could they race?	could I be racing? could you be racing? could he be racing? could we be racing? could you be racing? could they be racing?
Perfect	V-ing perfect
could I have raced? could you have raced? could he have raced? could we have raced? could you have raced? could they have raced?	could I have been racing? could you have been racing? could he have been racing? could we have been racing? could you have been racing? could they have been racing?

Interro-negative form

Simple form	V-ing form
could I not race? could you not race? could he not race? could we not race? could you not race? could they not race?	could I not be racing? could you not be racing? could he not be racing? could we not be racing? could you not be racing? could they not be racing?
Perfect	V-ing perfect
could I not have raced? could you not have raced? could he not have raced? could we not have raced? could you not have raced? could they not have raced?	could I not have been racing? could you not have been racing? could he not have been racing? could we not have been racing? could you not have been racing? could they not have been racing?