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