I could aviate you could aviate he could aviate we could aviate you could aviate they could aviate
Forme en 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
Perfect
I could have aviated you could have aviated he could have aviated we could have aviated you could have aviated they could have aviated
Perfect en 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
Négation
Forme simple
I could not aviate you could not aviate he could not aviate we could not aviate you could not aviate they could not aviate
Forme en V-ing
I could not be aviating you could not be aviating he could not be aviating we could not be aviating you could not be aviating they could not be aviating
Perfect
I could not have aviated you could not have aviated he could not have aviated we could not have aviated you could not have aviated they could not have aviated
Perfect en V-ing
I could not have been aviating you could not have been aviating he could not have been aviating we could not have been aviating you could not have been aviating they could not have been aviating
Forme interrogative
Forme simple
could I aviate? could you aviate? could he aviate? could we aviate? could you aviate? could they aviate?
Forme en 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?
Perfect
could I have aviated? could you have aviated? could he have aviated? could we have aviated? could you have aviated? could they have aviated?
Perfect en 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?
Forme interro-négative
Forme simple
could I not aviate? could you not aviate? could he not aviate? could we not aviate? could you not aviate? could they not aviate?
Forme en V-ing
could I not be aviating? could you not be aviating? could he not be aviating? could we not be aviating? could you not be aviating? could they not be aviating?
Perfect
could I not have aviated? could you not have aviated? could he not have aviated? could we not have aviated? could you not have aviated? could they not have aviated?
Perfect en V-ing
could I not have been aviating? could you not have been aviating? could he not have been aviating? could we not have been aviating? could you not have been aviating? could they not have been aviating?