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