I can block you can block he can block we can block you can block they can block
Forma con V-ing
I can be blocking you can be blocking he can be blocking we can be blocking you can be blocking they can be blocking
Perfecto
I can have blocked you can have blocked he can have blocked we can have blocked you can have blocked they can have blocked
Perfecto con V-ing
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
Negación
Forma simple
I can't block you can't block he can't block we can't block you can't block they can't block
Forma con V-ing
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
Perfecto
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
Perfecto con V-ing
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
Forma interrogativa
Forma simple
can I block? can you block? can he block? can we block? can you block? can they block?
Forma con V-ing
can I be blocking? can you be blocking? can he be blocking? can we be blocking? can you be blocking? can they be blocking?
Perfecto
can I have blocked? can you have blocked? can he have blocked? can we have blocked? can you have blocked? can they have blocked?
Perfecto con V-ing
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?
Forma interro-negativa
Forma simple
can't I block? can't you block? can't he block? can't we block? can't you block? can't they block?
Forma con V-ing
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?
Perfecto
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?
Perfecto con V-ing
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?