I can punch you can punch he can punch we can punch you can punch they can punch
Forma con V-ing
I can be punching you can be punching he can be punching we can be punching you can be punching they can be punching
Perfecto
I can have punched you can have punched he can have punched we can have punched you can have punched they can have punched
Perfecto con V-ing
I can have been punching you can have been punching he can have been punching we can have been punching you can have been punching they can have been punching
Negación
Forma simple
I can't punch you can't punch he can't punch we can't punch you can't punch they can't punch
Forma con V-ing
I can't be punching you can't be punching he can't be punching we can't be punching you can't be punching they can't be punching
Perfecto
I can't have punched you can't have punched he can't have punched we can't have punched you can't have punched they can't have punched
Perfecto con V-ing
I can't have been punching you can't have been punching he can't have been punching we can't have been punching you can't have been punching they can't have been punching
Forma interrogativa
Forma simple
can I punch? can you punch? can he punch? can we punch? can you punch? can they punch?
Forma con V-ing
can I be punching? can you be punching? can he be punching? can we be punching? can you be punching? can they be punching?
Perfecto
can I have punched? can you have punched? can he have punched? can we have punched? can you have punched? can they have punched?
Perfecto con V-ing
can I have been punching? can you have been punching? can he have been punching? can we have been punching? can you have been punching? can they have been punching?
Forma interro-negativa
Forma simple
can't I punch? can't you punch? can't he punch? can't we punch? can't you punch? can't they punch?
Forma con V-ing
can't I be punching? can't you be punching? can't he be punching? can't we be punching? can't you be punching? can't they be punching?
Perfecto
can't I have punched? can't you have punched? can't he have punched? can't we have punched? can't you have punched? can't they have punched?
Perfecto con V-ing
can't I have been punching? can't you have been punching? can't he have been punching? can't we have been punching? can't you have been punching? can't they have been punching?