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