I can perceive you can perceive he can perceive we can perceive you can perceive they can perceive
Forma con V-ing
I can be perceiving you can be perceiving he can be perceiving we can be perceiving you can be perceiving they can be perceiving
Perfecto
I can have perceived you can have perceived he can have perceived we can have perceived you can have perceived they can have perceived
Perfecto con V-ing
I can have been perceiving you can have been perceiving he can have been perceiving we can have been perceiving you can have been perceiving they can have been perceiving
Negación
Forma simple
I can't perceive you can't perceive he can't perceive we can't perceive you can't perceive they can't perceive
Forma con V-ing
I can't be perceiving you can't be perceiving he can't be perceiving we can't be perceiving you can't be perceiving they can't be perceiving
Perfecto
I can't have perceived you can't have perceived he can't have perceived we can't have perceived you can't have perceived they can't have perceived
Perfecto con V-ing
I can't have been perceiving you can't have been perceiving he can't have been perceiving we can't have been perceiving you can't have been perceiving they can't have been perceiving
Forma interrogativa
Forma simple
can I perceive? can you perceive? can he perceive? can we perceive? can you perceive? can they perceive?
Forma con V-ing
can I be perceiving? can you be perceiving? can he be perceiving? can we be perceiving? can you be perceiving? can they be perceiving?
Perfecto
can I have perceived? can you have perceived? can he have perceived? can we have perceived? can you have perceived? can they have perceived?
Perfecto con V-ing
can I have been perceiving? can you have been perceiving? can he have been perceiving? can we have been perceiving? can you have been perceiving? can they have been perceiving?
Forma interro-negativa
Forma simple
can't I perceive? can't you perceive? can't he perceive? can't we perceive? can't you perceive? can't they perceive?
Forma con V-ing
can't I be perceiving? can't you be perceiving? can't he be perceiving? can't we be perceiving? can't you be perceiving? can't they be perceiving?
Perfecto
can't I have perceived? can't you have perceived? can't he have perceived? can't we have perceived? can't you have perceived? can't they have perceived?
Perfecto con V-ing
can't I have been perceiving? can't you have been perceiving? can't he have been perceiving? can't we have been perceiving? can't you have been perceiving? can't they have been perceiving?