I could conserve you could conserve he could conserve we could conserve you could conserve they could conserve
Forme en V-ing
I could be conserving you could be conserving he could be conserving we could be conserving you could be conserving they could be conserving
Perfect
I could have conserved you could have conserved he could have conserved we could have conserved you could have conserved they could have conserved
Perfect en V-ing
I could have been conserving you could have been conserving he could have been conserving we could have been conserving you could have been conserving they could have been conserving
Négation
Forme simple
I could not conserve you could not conserve he could not conserve we could not conserve you could not conserve they could not conserve
Forme en V-ing
I could not be conserving you could not be conserving he could not be conserving we could not be conserving you could not be conserving they could not be conserving
Perfect
I could not have conserved you could not have conserved he could not have conserved we could not have conserved you could not have conserved they could not have conserved
Perfect en V-ing
I could not have been conserving you could not have been conserving he could not have been conserving we could not have been conserving you could not have been conserving they could not have been conserving
Forme interrogative
Forme simple
could I conserve? could you conserve? could he conserve? could we conserve? could you conserve? could they conserve?
Forme en V-ing
could I be conserving? could you be conserving? could he be conserving? could we be conserving? could you be conserving? could they be conserving?
Perfect
could I have conserved? could you have conserved? could he have conserved? could we have conserved? could you have conserved? could they have conserved?
Perfect en V-ing
could I have been conserving? could you have been conserving? could he have been conserving? could we have been conserving? could you have been conserving? could they have been conserving?
Forme interro-négative
Forme simple
could I not conserve? could you not conserve? could he not conserve? could we not conserve? could you not conserve? could they not conserve?
Forme en V-ing
could I not be conserving? could you not be conserving? could he not be conserving? could we not be conserving? could you not be conserving? could they not be conserving?
Perfect
could I not have conserved? could you not have conserved? could he not have conserved? could we not have conserved? could you not have conserved? could they not have conserved?
Perfect en V-ing
could I not have been conserving? could you not have been conserving? could he not have been conserving? could we not have been conserving? could you not have been conserving? could they not have been conserving?