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