I can harden you can harden she can harden we can harden you can harden they can harden
Forma con V-ing
I can be hardening you can be hardening she can be hardening we can be hardening you can be hardening they can be hardening
Perfecto
I can have hardened you can have hardened she can have hardened we can have hardened you can have hardened they can have hardened
Perfecto con V-ing
I can have been hardening you can have been hardening she can have been hardening we can have been hardening you can have been hardening they can have been hardening
Negación
Forma simple
I can't harden you can't harden she can't harden we can't harden you can't harden they can't harden
Forma con V-ing
I can't be hardening you can't be hardening she can't be hardening we can't be hardening you can't be hardening they can't be hardening
Perfecto
I can't have hardened you can't have hardened she can't have hardened we can't have hardened you can't have hardened they can't have hardened
Perfecto con V-ing
I can't have been hardening you can't have been hardening she can't have been hardening we can't have been hardening you can't have been hardening they can't have been hardening
Forma interrogativa
Forma simple
can I harden? can you harden? can she harden? can we harden? can you harden? can they harden?
Forma con V-ing
can I be hardening? can you be hardening? can she be hardening? can we be hardening? can you be hardening? can they be hardening?
Perfecto
can I have hardened? can you have hardened? can she have hardened? can we have hardened? can you have hardened? can they have hardened?
Perfecto con V-ing
can I have been hardening? can you have been hardening? can she have been hardening? can we have been hardening? can you have been hardening? can they have been hardening?
Forma interro-negativa
Forma simple
can't I harden? can't you harden? can't she harden? can't we harden? can't you harden? can't they harden?
Forma con V-ing
can't I be hardening? can't you be hardening? can't she be hardening? can't we be hardening? can't you be hardening? can't they be hardening?
Perfecto
can't I have hardened? can't you have hardened? can't she have hardened? can't we have hardened? can't you have hardened? can't they have hardened?
Perfecto con V-ing
can't I have been hardening? can't you have been hardening? can't she have been hardening? can't we have been hardening? can't you have been hardening? can't they have been hardening?