could perambulate
Regular verb: perambulate - perambulated- perambulated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could perambulate
you could perambulate
he could perambulate
we could perambulate
you could perambulate
they could perambulate 	I could be perambulating
you could be perambulating
he could be perambulating
we could be perambulating
you could be perambulating
they could be perambulating	I could have perambulated
you could have perambulated
he 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
he 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
he 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
he 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
he 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
he 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 he perambulate?
could we perambulate?
could you perambulate?
could they perambulate? 	could I be perambulating?
could you be perambulating?
could he be perambulating?
could we be perambulating?
could you be perambulating?
could they be perambulating? 	could I have perambulated?
could you have perambulated?
could he 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 he 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 he 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 he 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 he 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 he have been perambulating?
couldn't we have been perambulating?
couldn't you have been perambulating?
couldn't they have been perambulating?