I could diagram you could diagram she could diagram we could diagram you could diagram they could diagram
Forma con V-ing
I could be diagraming you could be diagraming she could be diagraming we could be diagraming you could be diagraming they could be diagraming
Perfecto
I could have diagramed you could have diagramed she could have diagramed we could have diagramed you could have diagramed they could have diagramed
Perfecto con V-ing
I could have been diagraming you could have been diagraming she could have been diagraming we could have been diagraming you could have been diagraming they could have been diagraming
Negación
Forma simple
I couldn't diagram you couldn't diagram she couldn't diagram we couldn't diagram you couldn't diagram they couldn't diagram
Forma con V-ing
I couldn't be diagraming you couldn't be diagraming she couldn't be diagraming we couldn't be diagraming you couldn't be diagraming they couldn't be diagraming
Perfecto
I couldn't have diagramed you couldn't have diagramed she couldn't have diagramed we couldn't have diagramed you couldn't have diagramed they couldn't have diagramed
Perfecto con V-ing
I couldn't have been diagraming you couldn't have been diagraming she couldn't have been diagraming we couldn't have been diagraming you couldn't have been diagraming they couldn't have been diagraming
Forma interrogativa
Forma simple
could I diagram? could you diagram? could she diagram? could we diagram? could you diagram? could they diagram?
Forma con V-ing
could I be diagraming? could you be diagraming? could she be diagraming? could we be diagraming? could you be diagraming? could they be diagraming?
Perfecto
could I have diagramed? could you have diagramed? could she have diagramed? could we have diagramed? could you have diagramed? could they have diagramed?
Perfecto con V-ing
could I have been diagraming? could you have been diagraming? could she have been diagraming? could we have been diagraming? could you have been diagraming? could they have been diagraming?
Forma interro-negativa
Forma simple
couldn't I diagram? couldn't you diagram? couldn't she diagram? couldn't we diagram? couldn't you diagram? couldn't they diagram?
Forma con V-ing
couldn't I be diagraming? couldn't you be diagraming? couldn't she be diagraming? couldn't we be diagraming? couldn't you be diagraming? couldn't they be diagraming?
Perfecto
couldn't I have diagramed? couldn't you have diagramed? couldn't she have diagramed? couldn't we have diagramed? couldn't you have diagramed? couldn't they have diagramed?
Perfecto con V-ing
couldn't I have been diagraming? couldn't you have been diagraming? couldn't she have been diagraming? couldn't we have been diagraming? couldn't you have been diagraming? couldn't they have been diagraming?