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 cannot unhook you cannot unhook he cannot unhook we cannot unhook you cannot unhook they cannot unhook
V-ing form
I cannot be unhooking you cannot be unhooking he cannot be unhooking we cannot be unhooking you cannot be unhooking they cannot be unhooking
Perfect
I cannot have unhooked you cannot have unhooked he cannot have unhooked we cannot have unhooked you cannot have unhooked they cannot have unhooked
V-ing perfect
I cannot have been unhooking you cannot have been unhooking he cannot have been unhooking we cannot have been unhooking you cannot have been unhooking they cannot 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 I not unhook? can you not unhook? can he not unhook? can we not unhook? can you not unhook? can they not unhook?
V-ing form
can I not be unhooking? can you not be unhooking? can he not be unhooking? can we not be unhooking? can you not be unhooking? can they not be unhooking?
Perfect
can I not have unhooked? can you not have unhooked? can he not have unhooked? can we not have unhooked? can you not have unhooked? can they not have unhooked?
V-ing perfect
can I not have been unhooking? can you not have been unhooking? can he not have been unhooking? can we not have been unhooking? can you not have been unhooking? can they not have been unhooking?