could stroll
Regular verb: stroll - strolled- strolled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could stroll
you could stroll
she could stroll
we could stroll
you could stroll
they could stroll 	I could be strolling
you could be strolling
she could be strolling
we could be strolling
you could be strolling
they could be strolling	I could have strolled
you could have strolled
she could have strolled
we could have strolled
you could have strolled
they could have strolled	I could have been strolling
you could have been strolling
she could have been strolling
we could have been strolling
you could have been strolling
they could have been strolling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not stroll
you could not stroll
she could not stroll
we could not stroll
you could not stroll
they could not stroll 	I could not be strolling
you could not be strolling
she could not be strolling
we could not be strolling
you could not be strolling
they could not be strolling	I could not have strolled
you could not have strolled
she could not have strolled
we could not have strolled
you could not have strolled
they could not have strolled	I could not have been strolling
you could not have been strolling
she could not have been strolling
we could not have been strolling
you could not have been strolling
they could not have been strolling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I stroll?
could you stroll?
could she stroll?
could we stroll?
could you stroll?
could they stroll? 	could I be strolling?
could you be strolling?
could she be strolling?
could we be strolling?
could you be strolling?
could they be strolling? 	could I have strolled?
could you have strolled?
could she have strolled?
could we have strolled?
could you have strolled?
could they have strolled? 	could I have been strolling?
could you have been strolling?
could she have been strolling?
could we have been strolling?
could you have been strolling?
could they have been strolling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not stroll?
could you not stroll?
could she not stroll?
could we not stroll?
could you not stroll?
could they not stroll? 	could I not be strolling?
could you not be strolling?
could she not be strolling?
could we not be strolling?
could you not be strolling?
could they not be strolling? 	could I not have strolled?
could you not have strolled?
could she not have strolled?
could we not have strolled?
could you not have strolled?
could they not have strolled? 	could I not have been strolling?
could you not have been strolling?
could she not have been strolling?
could we not have been strolling?
could you not have been strolling?
could they not have been strolling?