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 can't block you can't block he can't block we can't block you can't block they can't block	I can't be blocking you can't be blocking he can't be blocking we can't be blocking you can't be blocking they can't be blocking
Perfect	V-ing perfect
I can't have blocked you can't have blocked he can't have blocked we can't have blocked you can't have blocked they can't have blocked	I can't have been blocking you can't have been blocking he can't have been blocking we can't have been blocking you can't have been blocking they can't 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't I block? can't you block? can't he block? can't we block? can't you block? can't they block?	can't I be blocking? can't you be blocking? can't he be blocking? can't we be blocking? can't you be blocking? can't they be blocking?
Perfect	V-ing perfect
can't I have blocked? can't you have blocked? can't he have blocked? can't we have blocked? can't you have blocked? can't they have blocked?	can't I have been blocking? can't you have been blocking? can't he have been blocking? can't we have been blocking? can't you have been blocking? can't they have been blocking?