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