can circulate
Regular verb: circulate - circulated- circulated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can circulate
you can circulate
he can circulate
we can circulate
you can circulate
they can circulate 	I can be circulating
you can be circulating
he can be circulating
we can be circulating
you can be circulating
they can be circulating	I can have circulated
you can have circulated
he can have circulated
we can have circulated
you can have circulated
they can have circulated	I can have been circulating
you can have been circulating
he can have been circulating
we can have been circulating
you can have been circulating
they can have been circulating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't circulate
you can't circulate
he can't circulate
we can't circulate
you can't circulate
they can't circulate 	I can't be circulating
you can't be circulating
he can't be circulating
we can't be circulating
you can't be circulating
they can't be circulating	I can't have circulated
you can't have circulated
he can't have circulated
we can't have circulated
you can't have circulated
they can't have circulated	I can't have been circulating
you can't have been circulating
he can't have been circulating
we can't have been circulating
you can't have been circulating
they can't have been circulating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I circulate?
can you circulate?
can he circulate?
can we circulate?
can you circulate?
can they circulate? 	can I be circulating?
can you be circulating?
can he be circulating?
can we be circulating?
can you be circulating?
can they be circulating? 	can I have circulated?
can you have circulated?
can he have circulated?
can we have circulated?
can you have circulated?
can they have circulated? 	can I have been circulating?
can you have been circulating?
can he have been circulating?
can we have been circulating?
can you have been circulating?
can they have been circulating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I circulate?
can't you circulate?
can't he circulate?
can't we circulate?
can't you circulate?
can't they circulate? 	can't I be circulating?
can't you be circulating?
can't he be circulating?
can't we be circulating?
can't you be circulating?
can't they be circulating? 	can't I have circulated?
can't you have circulated?
can't he have circulated?
can't we have circulated?
can't you have circulated?
can't they have circulated? 	can't I have been circulating?
can't you have been circulating?
can't he have been circulating?
can't we have been circulating?
can't you have been circulating?
can't they have been circulating?