I could tan you could tan he could tan we could tan you could tan they could tan
Forma con V-ing
I could be tanning you could be tanning he could be tanning we could be tanning you could be tanning they could be tanning
Perfecto
I could have tanned you could have tanned he could have tanned we could have tanned you could have tanned they could have tanned
Perfecto con V-ing
I could have been tanning you could have been tanning he could have been tanning we could have been tanning you could have been tanning they could have been tanning
Negación
Forma simple
I could not tan you could not tan he could not tan we could not tan you could not tan they could not tan
Forma con V-ing
I could not be tanning you could not be tanning he could not be tanning we could not be tanning you could not be tanning they could not be tanning
Perfecto
I could not have tanned you could not have tanned he could not have tanned we could not have tanned you could not have tanned they could not have tanned
Perfecto con V-ing
I could not have been tanning you could not have been tanning he could not have been tanning we could not have been tanning you could not have been tanning they could not have been tanning
Forma interrogativa
Forma simple
could I tan? could you tan? could he tan? could we tan? could you tan? could they tan?
Forma con V-ing
could I be tanning? could you be tanning? could he be tanning? could we be tanning? could you be tanning? could they be tanning?
Perfecto
could I have tanned? could you have tanned? could he have tanned? could we have tanned? could you have tanned? could they have tanned?
Perfecto con V-ing
could I have been tanning? could you have been tanning? could he have been tanning? could we have been tanning? could you have been tanning? could they have been tanning?
Forma interro-negativa
Forma simple
could I not tan? could you not tan? could he not tan? could we not tan? could you not tan? could they not tan?
Forma con V-ing
could I not be tanning? could you not be tanning? could he not be tanning? could we not be tanning? could you not be tanning? could they not be tanning?
Perfecto
could I not have tanned? could you not have tanned? could he not have tanned? could we not have tanned? could you not have tanned? could they not have tanned?
Perfecto con V-ing
could I not have been tanning? could you not have been tanning? could he not have been tanning? could we not have been tanning? could you not have been tanning? could they not have been tanning?