I can pin you can pin he can pin we can pin you can pin they can pin
V-ing form
I can be pinning you can be pinning he can be pinning we can be pinning you can be pinning they can be pinning
Perfect
I can have pinned you can have pinned he can have pinned we can have pinned you can have pinned they can have pinned
V-ing perfect
I can have been pinning you can have been pinning he can have been pinning we can have been pinning you can have been pinning they can have been pinning
Negation
Simple form
I can't pin you can't pin he can't pin we can't pin you can't pin they can't pin
V-ing form
I can't be pinning you can't be pinning he can't be pinning we can't be pinning you can't be pinning they can't be pinning
Perfect
I can't have pinned you can't have pinned he can't have pinned we can't have pinned you can't have pinned they can't have pinned
V-ing perfect
I can't have been pinning you can't have been pinning he can't have been pinning we can't have been pinning you can't have been pinning they can't have been pinning
Interrogative form
Simple form
can I pin? can you pin? can he pin? can we pin? can you pin? can they pin?
V-ing form
can I be pinning? can you be pinning? can he be pinning? can we be pinning? can you be pinning? can they be pinning?
Perfect
can I have pinned? can you have pinned? can he have pinned? can we have pinned? can you have pinned? can they have pinned?
V-ing perfect
can I have been pinning? can you have been pinning? can he have been pinning? can we have been pinning? can you have been pinning? can they have been pinning?
Interro-negative form
Simple form
can't I pin? can't you pin? can't he pin? can't we pin? can't you pin? can't they pin?
V-ing form
can't I be pinning? can't you be pinning? can't he be pinning? can't we be pinning? can't you be pinning? can't they be pinning?
Perfect
can't I have pinned? can't you have pinned? can't he have pinned? can't we have pinned? can't you have pinned? can't they have pinned?
V-ing perfect
can't I have been pinning? can't you have been pinning? can't he have been pinning? can't we have been pinning? can't you have been pinning? can't they have been pinning?