I could stamp you could stamp she could stamp we could stamp you could stamp they could stamp
Forma con V-ing
I could be stamping you could be stamping she could be stamping we could be stamping you could be stamping they could be stamping
Perfecto
I could have stamped you could have stamped she could have stamped we could have stamped you could have stamped they could have stamped
Perfecto con V-ing
I could have been stamping you could have been stamping she could have been stamping we could have been stamping you could have been stamping they could have been stamping
Negación
Forma simple
I could not stamp you could not stamp she could not stamp we could not stamp you could not stamp they could not stamp
Forma con V-ing
I could not be stamping you could not be stamping she could not be stamping we could not be stamping you could not be stamping they could not be stamping
Perfecto
I could not have stamped you could not have stamped she could not have stamped we could not have stamped you could not have stamped they could not have stamped
Perfecto con V-ing
I could not have been stamping you could not have been stamping she could not have been stamping we could not have been stamping you could not have been stamping they could not have been stamping
Forma interrogativa
Forma simple
could I stamp? could you stamp? could she stamp? could we stamp? could you stamp? could they stamp?
Forma con V-ing
could I be stamping? could you be stamping? could she be stamping? could we be stamping? could you be stamping? could they be stamping?
Perfecto
could I have stamped? could you have stamped? could she have stamped? could we have stamped? could you have stamped? could they have stamped?
Perfecto con V-ing
could I have been stamping? could you have been stamping? could she have been stamping? could we have been stamping? could you have been stamping? could they have been stamping?
Forma interro-negativa
Forma simple
could I not stamp? could you not stamp? could she not stamp? could we not stamp? could you not stamp? could they not stamp?
Forma con V-ing
could I not be stamping? could you not be stamping? could she not be stamping? could we not be stamping? could you not be stamping? could they not be stamping?
Perfecto
could I not have stamped? could you not have stamped? could she not have stamped? could we not have stamped? could you not have stamped? could they not have stamped?
Perfecto con V-ing
could I not have been stamping? could you not have been stamping? could she not have been stamping? could we not have been stamping? could you not have been stamping? could they not have been stamping?