I could lift you could lift he could lift we could lift you could lift they could lift
Forma con V-ing
I could be lifting you could be lifting he could be lifting we could be lifting you could be lifting they could be lifting
Perfecto
I could have lifted you could have lifted he could have lifted we could have lifted you could have lifted they could have lifted
Perfecto con V-ing
I could have been lifting you could have been lifting he could have been lifting we could have been lifting you could have been lifting they could have been lifting
Negación
Forma simple
I couldn't lift you couldn't lift he couldn't lift we couldn't lift you couldn't lift they couldn't lift
Forma con V-ing
I couldn't be lifting you couldn't be lifting he couldn't be lifting we couldn't be lifting you couldn't be lifting they couldn't be lifting
Perfecto
I couldn't have lifted you couldn't have lifted he couldn't have lifted we couldn't have lifted you couldn't have lifted they couldn't have lifted
Perfecto con V-ing
I couldn't have been lifting you couldn't have been lifting he couldn't have been lifting we couldn't have been lifting you couldn't have been lifting they couldn't have been lifting
Forma interrogativa
Forma simple
could I lift? could you lift? could he lift? could we lift? could you lift? could they lift?
Forma con V-ing
could I be lifting? could you be lifting? could he be lifting? could we be lifting? could you be lifting? could they be lifting?
Perfecto
could I have lifted? could you have lifted? could he have lifted? could we have lifted? could you have lifted? could they have lifted?
Perfecto con V-ing
could I have been lifting? could you have been lifting? could he have been lifting? could we have been lifting? could you have been lifting? could they have been lifting?
Forma interro-negativa
Forma simple
couldn't I lift? couldn't you lift? couldn't he lift? couldn't we lift? couldn't you lift? couldn't they lift?
Forma con V-ing
couldn't I be lifting? couldn't you be lifting? couldn't he be lifting? couldn't we be lifting? couldn't you be lifting? couldn't they be lifting?
Perfecto
couldn't I have lifted? couldn't you have lifted? couldn't he have lifted? couldn't we have lifted? couldn't you have lifted? couldn't they have lifted?
Perfecto con V-ing
couldn't I have been lifting? couldn't you have been lifting? couldn't he have been lifting? couldn't we have been lifting? couldn't you have been lifting? couldn't they have been lifting?