I could thicken you could thicken he could thicken we could thicken you could thicken they could thicken
Forma con V-ing
I could be thickening you could be thickening he could be thickening we could be thickening you could be thickening they could be thickening
Perfecto
I could have thickened you could have thickened he could have thickened we could have thickened you could have thickened they could have thickened
Perfecto con V-ing
I could have been thickening you could have been thickening he could have been thickening we could have been thickening you could have been thickening they could have been thickening
Negación
Forma simple
I could not thicken you could not thicken he could not thicken we could not thicken you could not thicken they could not thicken
Forma con V-ing
I could not be thickening you could not be thickening he could not be thickening we could not be thickening you could not be thickening they could not be thickening
Perfecto
I could not have thickened you could not have thickened he could not have thickened we could not have thickened you could not have thickened they could not have thickened
Perfecto con V-ing
I could not have been thickening you could not have been thickening he could not have been thickening we could not have been thickening you could not have been thickening they could not have been thickening
Forma interrogativa
Forma simple
could I thicken? could you thicken? could he thicken? could we thicken? could you thicken? could they thicken?
Forma con V-ing
could I be thickening? could you be thickening? could he be thickening? could we be thickening? could you be thickening? could they be thickening?
Perfecto
could I have thickened? could you have thickened? could he have thickened? could we have thickened? could you have thickened? could they have thickened?
Perfecto con V-ing
could I have been thickening? could you have been thickening? could he have been thickening? could we have been thickening? could you have been thickening? could they have been thickening?
Forma interro-negativa
Forma simple
could I not thicken? could you not thicken? could he not thicken? could we not thicken? could you not thicken? could they not thicken?
Forma con V-ing
could I not be thickening? could you not be thickening? could he not be thickening? could we not be thickening? could you not be thickening? could they not be thickening?
Perfecto
could I not have thickened? could you not have thickened? could he not have thickened? could we not have thickened? could you not have thickened? could they not have thickened?
Perfecto con V-ing
could I not have been thickening? could you not have been thickening? could he not have been thickening? could we not have been thickening? could you not have been thickening? could they not have been thickening?