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