I could submerge you could submerge he could submerge we could submerge you could submerge they could submerge
Forme en V-ing
I could be submerging you could be submerging he could be submerging we could be submerging you could be submerging they could be submerging
Perfect
I could have submerged you could have submerged he could have submerged we could have submerged you could have submerged they could have submerged
Perfect en V-ing
I could have been submerging you could have been submerging he could have been submerging we could have been submerging you could have been submerging they could have been submerging
Négation
Forme simple
I could not submerge you could not submerge he could not submerge we could not submerge you could not submerge they could not submerge
Forme en V-ing
I could not be submerging you could not be submerging he could not be submerging we could not be submerging you could not be submerging they could not be submerging
Perfect
I could not have submerged you could not have submerged he could not have submerged we could not have submerged you could not have submerged they could not have submerged
Perfect en V-ing
I could not have been submerging you could not have been submerging he could not have been submerging we could not have been submerging you could not have been submerging they could not have been submerging
Forme interrogative
Forme simple
could I submerge? could you submerge? could he submerge? could we submerge? could you submerge? could they submerge?
Forme en V-ing
could I be submerging? could you be submerging? could he be submerging? could we be submerging? could you be submerging? could they be submerging?
Perfect
could I have submerged? could you have submerged? could he have submerged? could we have submerged? could you have submerged? could they have submerged?
Perfect en V-ing
could I have been submerging? could you have been submerging? could he have been submerging? could we have been submerging? could you have been submerging? could they have been submerging?
Forme interro-négative
Forme simple
could I not submerge? could you not submerge? could he not submerge? could we not submerge? could you not submerge? could they not submerge?
Forme en V-ing
could I not be submerging? could you not be submerging? could he not be submerging? could we not be submerging? could you not be submerging? could they not be submerging?
Perfect
could I not have submerged? could you not have submerged? could he not have submerged? could we not have submerged? could you not have submerged? could they not have submerged?
Perfect en V-ing
could I not have been submerging? could you not have been submerging? could he not have been submerging? could we not have been submerging? could you not have been submerging? could they not have been submerging?