I can pin you can pin she can pin we can pin you can pin they can pin
V-ing form
I can be pinning you can be pinning she can be pinning we can be pinning you can be pinning they can be pinning
Perfect
I can have pinned you can have pinned she 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 she can have been pinning we can have been pinning you can have been pinning they can have been pinning
Negation
Simple form
I cannot pin you cannot pin she cannot pin we cannot pin you cannot pin they cannot pin
V-ing form
I cannot be pinning you cannot be pinning she cannot be pinning we cannot be pinning you cannot be pinning they cannot be pinning
Perfect
I cannot have pinned you cannot have pinned she cannot have pinned we cannot have pinned you cannot have pinned they cannot have pinned
V-ing perfect
I cannot have been pinning you cannot have been pinning she cannot have been pinning we cannot have been pinning you cannot have been pinning they cannot have been pinning
Interrogative form
Simple form
can I pin? can you pin? can she pin? can we pin? can you pin? can they pin?
V-ing form
can I be pinning? can you be pinning? can she be pinning? can we be pinning? can you be pinning? can they be pinning?
Perfect
can I have pinned? can you have pinned? can she 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 she have been pinning? can we have been pinning? can you have been pinning? can they have been pinning?
Interro-negative form
Simple form
can I not pin? can you not pin? can she not pin? can we not pin? can you not pin? can they not pin?
V-ing form
can I not be pinning? can you not be pinning? can she not be pinning? can we not be pinning? can you not be pinning? can they not be pinning?
Perfect
can I not have pinned? can you not have pinned? can she not have pinned? can we not have pinned? can you not have pinned? can they not have pinned?
V-ing perfect
can I not have been pinning? can you not have been pinning? can she not have been pinning? can we not have been pinning? can you not have been pinning? can they not have been pinning?