I could ensure you could ensure she could ensure we could ensure you could ensure they could ensure
Forme en V-ing
I could be ensuring you could be ensuring she could be ensuring we could be ensuring you could be ensuring they could be ensuring
Perfect
I could have ensured you could have ensured she could have ensured we could have ensured you could have ensured they could have ensured
Perfect en V-ing
I could have been ensuring you could have been ensuring she could have been ensuring we could have been ensuring you could have been ensuring they could have been ensuring
Négation
Forme simple
I couldn't ensure you couldn't ensure she couldn't ensure we couldn't ensure you couldn't ensure they couldn't ensure
Forme en V-ing
I couldn't be ensuring you couldn't be ensuring she couldn't be ensuring we couldn't be ensuring you couldn't be ensuring they couldn't be ensuring
Perfect
I couldn't have ensured you couldn't have ensured she couldn't have ensured we couldn't have ensured you couldn't have ensured they couldn't have ensured
Perfect en V-ing
I couldn't have been ensuring you couldn't have been ensuring she couldn't have been ensuring we couldn't have been ensuring you couldn't have been ensuring they couldn't have been ensuring
Forme interrogative
Forme simple
could I ensure? could you ensure? could she ensure? could we ensure? could you ensure? could they ensure?
Forme en V-ing
could I be ensuring? could you be ensuring? could she be ensuring? could we be ensuring? could you be ensuring? could they be ensuring?
Perfect
could I have ensured? could you have ensured? could she have ensured? could we have ensured? could you have ensured? could they have ensured?
Perfect en V-ing
could I have been ensuring? could you have been ensuring? could she have been ensuring? could we have been ensuring? could you have been ensuring? could they have been ensuring?
Forme interro-négative
Forme simple
couldn't I ensure? couldn't you ensure? couldn't she ensure? couldn't we ensure? couldn't you ensure? couldn't they ensure?
Forme en V-ing
couldn't I be ensuring? couldn't you be ensuring? couldn't she be ensuring? couldn't we be ensuring? couldn't you be ensuring? couldn't they be ensuring?
Perfect
couldn't I have ensured? couldn't you have ensured? couldn't she have ensured? couldn't we have ensured? couldn't you have ensured? couldn't they have ensured?
Perfect en V-ing
couldn't I have been ensuring? couldn't you have been ensuring? couldn't she have been ensuring? couldn't we have been ensuring? couldn't you have been ensuring? couldn't they have been ensuring?