could pace
Regular verb: pace - paced- paced

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could pace
you could pace
he could pace
we could pace
you could pace
they could pace 	I could be pacing
you could be pacing
he could be pacing
we could be pacing
you could be pacing
they could be pacing	I could have paced
you could have paced
he could have paced
we could have paced
you could have paced
they could have paced	I could have been pacing
you could have been pacing
he could have been pacing
we could have been pacing
you could have been pacing
they could have been pacing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't pace
you couldn't pace
he couldn't pace
we couldn't pace
you couldn't pace
they couldn't pace 	I couldn't be pacing
you couldn't be pacing
he couldn't be pacing
we couldn't be pacing
you couldn't be pacing
they couldn't be pacing	I couldn't have paced
you couldn't have paced
he couldn't have paced
we couldn't have paced
you couldn't have paced
they couldn't have paced	I couldn't have been pacing
you couldn't have been pacing
he couldn't have been pacing
we couldn't have been pacing
you couldn't have been pacing
they couldn't have been pacing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I pace?
could you pace?
could he pace?
could we pace?
could you pace?
could they pace? 	could I be pacing?
could you be pacing?
could he be pacing?
could we be pacing?
could you be pacing?
could they be pacing? 	could I have paced?
could you have paced?
could he have paced?
could we have paced?
could you have paced?
could they have paced? 	could I have been pacing?
could you have been pacing?
could he have been pacing?
could we have been pacing?
could you have been pacing?
could they have been pacing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I pace?
couldn't you pace?
couldn't he pace?
couldn't we pace?
couldn't you pace?
couldn't they pace? 	couldn't I be pacing?
couldn't you be pacing?
couldn't he be pacing?
couldn't we be pacing?
couldn't you be pacing?
couldn't they be pacing? 	couldn't I have paced?
couldn't you have paced?
couldn't he have paced?
couldn't we have paced?
couldn't you have paced?
couldn't they have paced? 	couldn't I have been pacing?
couldn't you have been pacing?
couldn't he have been pacing?
couldn't we have been pacing?
couldn't you have been pacing?
couldn't they have been pacing?