could loop
Regular verb: loop - looped- looped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could loop
you could loop
he could loop
we could loop
you could loop
they could loop 	I could be looping
you could be looping
he could be looping
we could be looping
you could be looping
they could be looping	I could have looped
you could have looped
he could have looped
we could have looped
you could have looped
they could have looped	I could have been looping
you could have been looping
he could have been looping
we could have been looping
you could have been looping
they could have been looping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not loop
you could not loop
he could not loop
we could not loop
you could not loop
they could not loop 	I could not be looping
you could not be looping
he could not be looping
we could not be looping
you could not be looping
they could not be looping	I could not have looped
you could not have looped
he could not have looped
we could not have looped
you could not have looped
they could not have looped	I could not have been looping
you could not have been looping
he could not have been looping
we could not have been looping
you could not have been looping
they could not have been looping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I loop?
could you loop?
could he loop?
could we loop?
could you loop?
could they loop? 	could I be looping?
could you be looping?
could he be looping?
could we be looping?
could you be looping?
could they be looping? 	could I have looped?
could you have looped?
could he have looped?
could we have looped?
could you have looped?
could they have looped? 	could I have been looping?
could you have been looping?
could he have been looping?
could we have been looping?
could you have been looping?
could they have been looping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not loop?
could you not loop?
could he not loop?
could we not loop?
could you not loop?
could they not loop? 	could I not be looping?
could you not be looping?
could he not be looping?
could we not be looping?
could you not be looping?
could they not be looping? 	could I not have looped?
could you not have looped?
could he not have looped?
could we not have looped?
could you not have looped?
could they not have looped? 	could I not have been looping?
could you not have been looping?
could he not have been looping?
could we not have been looping?
could you not have been looping?
could they not have been looping?