could cool
Regular verb: cool - cooled- cooled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could cool
you could cool
she could cool
we could cool
you could cool
they could cool 	I could be cooling
you could be cooling
she could be cooling
we could be cooling
you could be cooling
they could be cooling	I could have cooled
you could have cooled
she could have cooled
we could have cooled
you could have cooled
they could have cooled	I could have been cooling
you could have been cooling
she could have been cooling
we could have been cooling
you could have been cooling
they could have been cooling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't cool
you couldn't cool
she couldn't cool
we couldn't cool
you couldn't cool
they couldn't cool 	I couldn't be cooling
you couldn't be cooling
she couldn't be cooling
we couldn't be cooling
you couldn't be cooling
they couldn't be cooling	I couldn't have cooled
you couldn't have cooled
she couldn't have cooled
we couldn't have cooled
you couldn't have cooled
they couldn't have cooled	I couldn't have been cooling
you couldn't have been cooling
she couldn't have been cooling
we couldn't have been cooling
you couldn't have been cooling
they couldn't have been cooling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I cool?
could you cool?
could she cool?
could we cool?
could you cool?
could they cool? 	could I be cooling?
could you be cooling?
could she be cooling?
could we be cooling?
could you be cooling?
could they be cooling? 	could I have cooled?
could you have cooled?
could she have cooled?
could we have cooled?
could you have cooled?
could they have cooled? 	could I have been cooling?
could you have been cooling?
could she have been cooling?
could we have been cooling?
could you have been cooling?
could they have been cooling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I cool?
couldn't you cool?
couldn't she cool?
couldn't we cool?
couldn't you cool?
couldn't they cool? 	couldn't I be cooling?
couldn't you be cooling?
couldn't she be cooling?
couldn't we be cooling?
couldn't you be cooling?
couldn't they be cooling? 	couldn't I have cooled?
couldn't you have cooled?
couldn't she have cooled?
couldn't we have cooled?
couldn't you have cooled?
couldn't they have cooled? 	couldn't I have been cooling?
couldn't you have been cooling?
couldn't she have been cooling?
couldn't we have been cooling?
couldn't you have been cooling?
couldn't they have been cooling?