I can fox you can fox he can fox we can fox you can fox they can fox
Forma con V-ing
I can be foxing you can be foxing he can be foxing we can be foxing you can be foxing they can be foxing
Perfecto
I can have foxed you can have foxed he can have foxed we can have foxed you can have foxed they can have foxed
Perfecto con V-ing
I can have been foxing you can have been foxing he can have been foxing we can have been foxing you can have been foxing they can have been foxing
Negación
Forma simple
I cannot fox you cannot fox he cannot fox we cannot fox you cannot fox they cannot fox
Forma con V-ing
I cannot be foxing you cannot be foxing he cannot be foxing we cannot be foxing you cannot be foxing they cannot be foxing
Perfecto
I cannot have foxed you cannot have foxed he cannot have foxed we cannot have foxed you cannot have foxed they cannot have foxed
Perfecto con V-ing
I cannot have been foxing you cannot have been foxing he cannot have been foxing we cannot have been foxing you cannot have been foxing they cannot have been foxing
Forma interrogativa
Forma simple
can I fox? can you fox? can he fox? can we fox? can you fox? can they fox?
Forma con V-ing
can I be foxing? can you be foxing? can he be foxing? can we be foxing? can you be foxing? can they be foxing?
Perfecto
can I have foxed? can you have foxed? can he have foxed? can we have foxed? can you have foxed? can they have foxed?
Perfecto con V-ing
can I have been foxing? can you have been foxing? can he have been foxing? can we have been foxing? can you have been foxing? can they have been foxing?
Forma interro-negativa
Forma simple
can I not fox? can you not fox? can he not fox? can we not fox? can you not fox? can they not fox?
Forma con V-ing
can I not be foxing? can you not be foxing? can he not be foxing? can we not be foxing? can you not be foxing? can they not be foxing?
Perfecto
can I not have foxed? can you not have foxed? can he not have foxed? can we not have foxed? can you not have foxed? can they not have foxed?
Perfecto con V-ing
can I not have been foxing? can you not have been foxing? can he not have been foxing? can we not have been foxing? can you not have been foxing? can they not have been foxing?