I can unhook you can unhook he can unhook we can unhook you can unhook they can unhook
V-ing form
I can be unhooking you can be unhooking he can be unhooking we can be unhooking you can be unhooking they can be unhooking
Perfect
I can have unhooked you can have unhooked he can have unhooked we can have unhooked you can have unhooked they can have unhooked
V-ing perfect
I can have been unhooking you can have been unhooking he can have been unhooking we can have been unhooking you can have been unhooking they can have been unhooking
Negation
Simple form
I can't unhook you can't unhook he can't unhook we can't unhook you can't unhook they can't unhook
V-ing form
I can't be unhooking you can't be unhooking he can't be unhooking we can't be unhooking you can't be unhooking they can't be unhooking
Perfect
I can't have unhooked you can't have unhooked he can't have unhooked we can't have unhooked you can't have unhooked they can't have unhooked
V-ing perfect
I can't have been unhooking you can't have been unhooking he can't have been unhooking we can't have been unhooking you can't have been unhooking they can't have been unhooking
Interrogative form
Simple form
can I unhook? can you unhook? can he unhook? can we unhook? can you unhook? can they unhook?
V-ing form
can I be unhooking? can you be unhooking? can he be unhooking? can we be unhooking? can you be unhooking? can they be unhooking?
Perfect
can I have unhooked? can you have unhooked? can he have unhooked? can we have unhooked? can you have unhooked? can they have unhooked?
V-ing perfect
can I have been unhooking? can you have been unhooking? can he have been unhooking? can we have been unhooking? can you have been unhooking? can they have been unhooking?
Interro-negative form
Simple form
can't I unhook? can't you unhook? can't he unhook? can't we unhook? can't you unhook? can't they unhook?
V-ing form
can't I be unhooking? can't you be unhooking? can't he be unhooking? can't we be unhooking? can't you be unhooking? can't they be unhooking?
Perfect
can't I have unhooked? can't you have unhooked? can't he have unhooked? can't we have unhooked? can't you have unhooked? can't they have unhooked?
V-ing perfect
can't I have been unhooking? can't you have been unhooking? can't he have been unhooking? can't we have been unhooking? can't you have been unhooking? can't they have been unhooking?