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