I can fire you can fire he can fire we can fire you can fire they can fire
Forma con V-ing
I can be firing you can be firing he can be firing we can be firing you can be firing they can be firing
Perfecto
I can have fired you can have fired he can have fired we can have fired you can have fired they can have fired
Perfecto con V-ing
I can have been firing you can have been firing he can have been firing we can have been firing you can have been firing they can have been firing
Negación
Forma simple
I can't fire you can't fire he can't fire we can't fire you can't fire they can't fire
Forma con V-ing
I can't be firing you can't be firing he can't be firing we can't be firing you can't be firing they can't be firing
Perfecto
I can't have fired you can't have fired he can't have fired we can't have fired you can't have fired they can't have fired
Perfecto con V-ing
I can't have been firing you can't have been firing he can't have been firing we can't have been firing you can't have been firing they can't have been firing
Forma interrogativa
Forma simple
can I fire? can you fire? can he fire? can we fire? can you fire? can they fire?
Forma con V-ing
can I be firing? can you be firing? can he be firing? can we be firing? can you be firing? can they be firing?
Perfecto
can I have fired? can you have fired? can he have fired? can we have fired? can you have fired? can they have fired?
Perfecto con V-ing
can I have been firing? can you have been firing? can he have been firing? can we have been firing? can you have been firing? can they have been firing?
Forma interro-negativa
Forma simple
can't I fire? can't you fire? can't he fire? can't we fire? can't you fire? can't they fire?
Forma con V-ing
can't I be firing? can't you be firing? can't he be firing? can't we be firing? can't you be firing? can't they be firing?
Perfecto
can't I have fired? can't you have fired? can't he have fired? can't we have fired? can't you have fired? can't they have fired?
Perfecto con V-ing
can't I have been firing? can't you have been firing? can't he have been firing? can't we have been firing? can't you have been firing? can't they have been firing?