English verb conjugation
CAN BLOCK

Regular verb: block - blocked - blocked

Affirmation

Simple form	V-ing form
I can block you can block he can block we can block you can block they can block	I can be blocking you can be blocking he can be blocking we can be blocking you can be blocking they can be blocking
Perfect	V-ing perfect
I can have blocked you can have blocked he can have blocked we can have blocked you can have blocked they can have blocked	I can have been blocking you can have been blocking he can have been blocking we can have been blocking you can have been blocking they can have been blocking

Negation

Simple form	V-ing form
I cannot block you cannot block he cannot block we cannot block you cannot block they cannot block	I cannot be blocking you cannot be blocking he cannot be blocking we cannot be blocking you cannot be blocking they cannot be blocking
Perfect	V-ing perfect
I cannot have blocked you cannot have blocked he cannot have blocked we cannot have blocked you cannot have blocked they cannot have blocked	I cannot have been blocking you cannot have been blocking he cannot have been blocking we cannot have been blocking you cannot have been blocking they cannot have been blocking

Interrogative form

Simple form	V-ing form
can I block? can you block? can he block? can we block? can you block? can they block?	can I be blocking? can you be blocking? can he be blocking? can we be blocking? can you be blocking? can they be blocking?
Perfect	V-ing perfect
can I have blocked? can you have blocked? can he have blocked? can we have blocked? can you have blocked? can they have blocked?	can I have been blocking? can you have been blocking? can he have been blocking? can we have been blocking? can you have been blocking? can they have been blocking?

Interro-negative form

Simple form	V-ing form
can I not block? can you not block? can he not block? can we not block? can you not block? can they not block?	can I not be blocking? can you not be blocking? can he not be blocking? can we not be blocking? can you not be blocking? can they not be blocking?
Perfect	V-ing perfect
can I not have blocked? can you not have blocked? can he not have blocked? can we not have blocked? can you not have blocked? can they not have blocked?	can I not have been blocking? can you not have been blocking? can he not have been blocking? can we not have been blocking? can you not have been blocking? can they not have been blocking?