I can echo you can echo he can echo we can echo you can echo they can echo
Forma con V-ing
I can be echoing you can be echoing he can be echoing we can be echoing you can be echoing they can be echoing
Perfecto
I can have echoed you can have echoed he can have echoed we can have echoed you can have echoed they can have echoed
Perfecto con V-ing
I can have been echoing you can have been echoing he can have been echoing we can have been echoing you can have been echoing they can have been echoing
Negación
Forma simple
I can't echo you can't echo he can't echo we can't echo you can't echo they can't echo
Forma con V-ing
I can't be echoing you can't be echoing he can't be echoing we can't be echoing you can't be echoing they can't be echoing
Perfecto
I can't have echoed you can't have echoed he can't have echoed we can't have echoed you can't have echoed they can't have echoed
Perfecto con V-ing
I can't have been echoing you can't have been echoing he can't have been echoing we can't have been echoing you can't have been echoing they can't have been echoing
Forma interrogativa
Forma simple
can I echo? can you echo? can he echo? can we echo? can you echo? can they echo?
Forma con V-ing
can I be echoing? can you be echoing? can he be echoing? can we be echoing? can you be echoing? can they be echoing?
Perfecto
can I have echoed? can you have echoed? can he have echoed? can we have echoed? can you have echoed? can they have echoed?
Perfecto con V-ing
can I have been echoing? can you have been echoing? can he have been echoing? can we have been echoing? can you have been echoing? can they have been echoing?
Forma interro-negativa
Forma simple
can't I echo? can't you echo? can't he echo? can't we echo? can't you echo? can't they echo?
Forma con V-ing
can't I be echoing? can't you be echoing? can't he be echoing? can't we be echoing? can't you be echoing? can't they be echoing?
Perfecto
can't I have echoed? can't you have echoed? can't he have echoed? can't we have echoed? can't you have echoed? can't they have echoed?
Perfecto con V-ing
can't I have been echoing? can't you have been echoing? can't he have been echoing? can't we have been echoing? can't you have been echoing? can't they have been echoing?