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 couldn't tan you couldn't tan he couldn't tan we couldn't tan you couldn't tan they couldn't tan
Forma con V-ing
I couldn't be tanning you couldn't be tanning he couldn't be tanning we couldn't be tanning you couldn't be tanning they couldn't be tanning
Perfecto
I couldn't have tanned you couldn't have tanned he couldn't have tanned we couldn't have tanned you couldn't have tanned they couldn't have tanned
Perfecto con V-ing
I couldn't have been tanning you couldn't have been tanning he couldn't have been tanning we couldn't have been tanning you couldn't have been tanning they couldn't 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
couldn't I tan? couldn't you tan? couldn't he tan? couldn't we tan? couldn't you tan? couldn't they tan?
Forma con V-ing
couldn't I be tanning? couldn't you be tanning? couldn't he be tanning? couldn't we be tanning? couldn't you be tanning? couldn't they be tanning?
Perfecto
couldn't I have tanned? couldn't you have tanned? couldn't he have tanned? couldn't we have tanned? couldn't you have tanned? couldn't they have tanned?
Perfecto con V-ing
couldn't I have been tanning? couldn't you have been tanning? couldn't he have been tanning? couldn't we have been tanning? couldn't you have been tanning? couldn't they have been tanning?