could perambulate
Regular verb: perambulate - perambulated- perambulated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could perambulate
you could perambulate
she could perambulate
we could perambulate
you could perambulate
they could perambulate 	I could be perambulating
you could be perambulating
she could be perambulating
we could be perambulating
you could be perambulating
they could be perambulating	I could have perambulated
you could have perambulated
she could have perambulated
we could have perambulated
you could have perambulated
they could have perambulated	I could have been perambulating
you could have been perambulating
she could have been perambulating
we could have been perambulating
you could have been perambulating
they could have been perambulating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't perambulate
you couldn't perambulate
she couldn't perambulate
we couldn't perambulate
you couldn't perambulate
they couldn't perambulate 	I couldn't be perambulating
you couldn't be perambulating
she couldn't be perambulating
we couldn't be perambulating
you couldn't be perambulating
they couldn't be perambulating	I couldn't have perambulated
you couldn't have perambulated
she couldn't have perambulated
we couldn't have perambulated
you couldn't have perambulated
they couldn't have perambulated	I couldn't have been perambulating
you couldn't have been perambulating
she couldn't have been perambulating
we couldn't have been perambulating
you couldn't have been perambulating
they couldn't have been perambulating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I perambulate?
could you perambulate?
could she perambulate?
could we perambulate?
could you perambulate?
could they perambulate? 	could I be perambulating?
could you be perambulating?
could she be perambulating?
could we be perambulating?
could you be perambulating?
could they be perambulating? 	could I have perambulated?
could you have perambulated?
could she have perambulated?
could we have perambulated?
could you have perambulated?
could they have perambulated? 	could I have been perambulating?
could you have been perambulating?
could she have been perambulating?
could we have been perambulating?
could you have been perambulating?
could they have been perambulating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I perambulate?
couldn't you perambulate?
couldn't she perambulate?
couldn't we perambulate?
couldn't you perambulate?
couldn't they perambulate? 	couldn't I be perambulating?
couldn't you be perambulating?
couldn't she be perambulating?
couldn't we be perambulating?
couldn't you be perambulating?
couldn't they be perambulating? 	couldn't I have perambulated?
couldn't you have perambulated?
couldn't she have perambulated?
couldn't we have perambulated?
couldn't you have perambulated?
couldn't they have perambulated? 	couldn't I have been perambulating?
couldn't you have been perambulating?
couldn't she have been perambulating?
couldn't we have been perambulating?
couldn't you have been perambulating?
couldn't they have been perambulating?