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