could stope
Regular verb: stope - stoped- stoped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could stope
you could stope
he could stope
we could stope
you could stope
they could stope 	I could be stoping
you could be stoping
he could be stoping
we could be stoping
you could be stoping
they could be stoping	I could have stoped
you could have stoped
he could have stoped
we could have stoped
you could have stoped
they could have stoped	I could have been stoping
you could have been stoping
he could have been stoping
we could have been stoping
you could have been stoping
they could have been stoping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't stope
you couldn't stope
he couldn't stope
we couldn't stope
you couldn't stope
they couldn't stope 	I couldn't be stoping
you couldn't be stoping
he couldn't be stoping
we couldn't be stoping
you couldn't be stoping
they couldn't be stoping	I couldn't have stoped
you couldn't have stoped
he couldn't have stoped
we couldn't have stoped
you couldn't have stoped
they couldn't have stoped	I couldn't have been stoping
you couldn't have been stoping
he couldn't have been stoping
we couldn't have been stoping
you couldn't have been stoping
they couldn't have been stoping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I stope?
could you stope?
could he stope?
could we stope?
could you stope?
could they stope? 	could I be stoping?
could you be stoping?
could he be stoping?
could we be stoping?
could you be stoping?
could they be stoping? 	could I have stoped?
could you have stoped?
could he have stoped?
could we have stoped?
could you have stoped?
could they have stoped? 	could I have been stoping?
could you have been stoping?
could he have been stoping?
could we have been stoping?
could you have been stoping?
could they have been stoping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I stope?
couldn't you stope?
couldn't he stope?
couldn't we stope?
couldn't you stope?
couldn't they stope? 	couldn't I be stoping?
couldn't you be stoping?
couldn't he be stoping?
couldn't we be stoping?
couldn't you be stoping?
couldn't they be stoping? 	couldn't I have stoped?
couldn't you have stoped?
couldn't he have stoped?
couldn't we have stoped?
couldn't you have stoped?
couldn't they have stoped? 	couldn't I have been stoping?
couldn't you have been stoping?
couldn't he have been stoping?
couldn't we have been stoping?
couldn't you have been stoping?
couldn't they have been stoping?