I can tough you can tough she can tough we can tough you can tough they can tough
Forma con V-ing
I can be toughing you can be toughing she can be toughing we can be toughing you can be toughing they can be toughing
Perfecto
I can have toughed you can have toughed she can have toughed we can have toughed you can have toughed they can have toughed
Perfecto con V-ing
I can have been toughing you can have been toughing she can have been toughing we can have been toughing you can have been toughing they can have been toughing
Negación
Forma simple
I cannot tough you cannot tough she cannot tough we cannot tough you cannot tough they cannot tough
Forma con V-ing
I cannot be toughing you cannot be toughing she cannot be toughing we cannot be toughing you cannot be toughing they cannot be toughing
Perfecto
I cannot have toughed you cannot have toughed she cannot have toughed we cannot have toughed you cannot have toughed they cannot have toughed
Perfecto con V-ing
I cannot have been toughing you cannot have been toughing she cannot have been toughing we cannot have been toughing you cannot have been toughing they cannot have been toughing
Forma interrogativa
Forma simple
can I tough? can you tough? can she tough? can we tough? can you tough? can they tough?
Forma con V-ing
can I be toughing? can you be toughing? can she be toughing? can we be toughing? can you be toughing? can they be toughing?
Perfecto
can I have toughed? can you have toughed? can she have toughed? can we have toughed? can you have toughed? can they have toughed?
Perfecto con V-ing
can I have been toughing? can you have been toughing? can she have been toughing? can we have been toughing? can you have been toughing? can they have been toughing?
Forma interro-negativa
Forma simple
can I not tough? can you not tough? can she not tough? can we not tough? can you not tough? can they not tough?
Forma con V-ing
can I not be toughing? can you not be toughing? can she not be toughing? can we not be toughing? can you not be toughing? can they not be toughing?
Perfecto
can I not have toughed? can you not have toughed? can she not have toughed? can we not have toughed? can you not have toughed? can they not have toughed?
Perfecto con V-ing
can I not have been toughing? can you not have been toughing? can she not have been toughing? can we not have been toughing? can you not have been toughing? can they not have been toughing?