I can perk you can perk she can perk we can perk you can perk they can perk
Forma con V-ing
I can be perking you can be perking she can be perking we can be perking you can be perking they can be perking
Perfecto
I can have perked you can have perked she can have perked we can have perked you can have perked they can have perked
Perfecto con V-ing
I can have been perking you can have been perking she can have been perking we can have been perking you can have been perking they can have been perking
Negación
Forma simple
I cannot perk you cannot perk she cannot perk we cannot perk you cannot perk they cannot perk
Forma con V-ing
I cannot be perking you cannot be perking she cannot be perking we cannot be perking you cannot be perking they cannot be perking
Perfecto
I cannot have perked you cannot have perked she cannot have perked we cannot have perked you cannot have perked they cannot have perked
Perfecto con V-ing
I cannot have been perking you cannot have been perking she cannot have been perking we cannot have been perking you cannot have been perking they cannot have been perking
Forma interrogativa
Forma simple
can I perk? can you perk? can she perk? can we perk? can you perk? can they perk?
Forma con V-ing
can I be perking? can you be perking? can she be perking? can we be perking? can you be perking? can they be perking?
Perfecto
can I have perked? can you have perked? can she have perked? can we have perked? can you have perked? can they have perked?
Perfecto con V-ing
can I have been perking? can you have been perking? can she have been perking? can we have been perking? can you have been perking? can they have been perking?
Forma interro-negativa
Forma simple
can I not perk? can you not perk? can she not perk? can we not perk? can you not perk? can they not perk?
Forma con V-ing
can I not be perking? can you not be perking? can she not be perking? can we not be perking? can you not be perking? can they not be perking?
Perfecto
can I not have perked? can you not have perked? can she not have perked? can we not have perked? can you not have perked? can they not have perked?
Perfecto con V-ing
can I not have been perking? can you not have been perking? can she not have been perking? can we not have been perking? can you not have been perking? can they not have been perking?