could race
Regular verb: race - raced- raced

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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? 	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 	Perfect 	V-ing perfect 	
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? 	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?