I could obscure you could obscure he could obscure we could obscure you could obscure they could obscure
Forme en V-ing
I could be obscuring you could be obscuring he could be obscuring we could be obscuring you could be obscuring they could be obscuring
Perfect
I could have obscured you could have obscured he could have obscured we could have obscured you could have obscured they could have obscured
Perfect en V-ing
I could have been obscuring you could have been obscuring he could have been obscuring we could have been obscuring you could have been obscuring they could have been obscuring
Négation
Forme simple
I couldn't obscure you couldn't obscure he couldn't obscure we couldn't obscure you couldn't obscure they couldn't obscure
Forme en V-ing
I couldn't be obscuring you couldn't be obscuring he couldn't be obscuring we couldn't be obscuring you couldn't be obscuring they couldn't be obscuring
Perfect
I couldn't have obscured you couldn't have obscured he couldn't have obscured we couldn't have obscured you couldn't have obscured they couldn't have obscured
Perfect en V-ing
I couldn't have been obscuring you couldn't have been obscuring he couldn't have been obscuring we couldn't have been obscuring you couldn't have been obscuring they couldn't have been obscuring
Forme interrogative
Forme simple
could I obscure? could you obscure? could he obscure? could we obscure? could you obscure? could they obscure?
Forme en V-ing
could I be obscuring? could you be obscuring? could he be obscuring? could we be obscuring? could you be obscuring? could they be obscuring?
Perfect
could I have obscured? could you have obscured? could he have obscured? could we have obscured? could you have obscured? could they have obscured?
Perfect en V-ing
could I have been obscuring? could you have been obscuring? could he have been obscuring? could we have been obscuring? could you have been obscuring? could they have been obscuring?
Forme interro-négative
Forme simple
couldn't I obscure? couldn't you obscure? couldn't he obscure? couldn't we obscure? couldn't you obscure? couldn't they obscure?
Forme en V-ing
couldn't I be obscuring? couldn't you be obscuring? couldn't he be obscuring? couldn't we be obscuring? couldn't you be obscuring? couldn't they be obscuring?
Perfect
couldn't I have obscured? couldn't you have obscured? couldn't he have obscured? couldn't we have obscured? couldn't you have obscured? couldn't they have obscured?
Perfect en V-ing
couldn't I have been obscuring? couldn't you have been obscuring? couldn't he have been obscuring? couldn't we have been obscuring? couldn't you have been obscuring? couldn't they have been obscuring?