could brood
Regular verb: brood - brooded- brooded

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could brood
you could brood
she could brood
we could brood
you could brood
they could brood 	I could be brooding
you could be brooding
she could be brooding
we could be brooding
you could be brooding
they could be brooding	I could have brooded
you could have brooded
she could have brooded
we could have brooded
you could have brooded
they could have brooded	I could have been brooding
you could have been brooding
she could have been brooding
we could have been brooding
you could have been brooding
they could have been brooding	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't brood
you couldn't brood
she couldn't brood
we couldn't brood
you couldn't brood
they couldn't brood 	I couldn't be brooding
you couldn't be brooding
she couldn't be brooding
we couldn't be brooding
you couldn't be brooding
they couldn't be brooding	I couldn't have brooded
you couldn't have brooded
she couldn't have brooded
we couldn't have brooded
you couldn't have brooded
they couldn't have brooded	I couldn't have been brooding
you couldn't have been brooding
she couldn't have been brooding
we couldn't have been brooding
you couldn't have been brooding
they couldn't have been brooding	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I brood?
could you brood?
could she brood?
could we brood?
could you brood?
could they brood? 	could I be brooding?
could you be brooding?
could she be brooding?
could we be brooding?
could you be brooding?
could they be brooding? 	could I have brooded?
could you have brooded?
could she have brooded?
could we have brooded?
could you have brooded?
could they have brooded? 	could I have been brooding?
could you have been brooding?
could she have been brooding?
could we have been brooding?
could you have been brooding?
could they have been brooding? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I brood?
couldn't you brood?
couldn't she brood?
couldn't we brood?
couldn't you brood?
couldn't they brood? 	couldn't I be brooding?
couldn't you be brooding?
couldn't she be brooding?
couldn't we be brooding?
couldn't you be brooding?
couldn't they be brooding? 	couldn't I have brooded?
couldn't you have brooded?
couldn't she have brooded?
couldn't we have brooded?
couldn't you have brooded?
couldn't they have brooded? 	couldn't I have been brooding?
couldn't you have been brooding?
couldn't she have been brooding?
couldn't we have been brooding?
couldn't you have been brooding?
couldn't they have been brooding?