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