I could skin-dive you could skin-dive he could skin-dive we could skin-dive you could skin-dive they could skin-dive
Forme en V-ing
I could be skin-diving you could be skin-diving he could be skin-diving we could be skin-diving you could be skin-diving they could be skin-diving
Perfect
I could have skin-dived you could have skin-dived he could have skin-dived we could have skin-dived you could have skin-dived they could have skin-dived
Perfect en V-ing
I could have been skin-diving you could have been skin-diving he could have been skin-diving we could have been skin-diving you could have been skin-diving they could have been skin-diving
Négation
Forme simple
I could not skin-dive you could not skin-dive he could not skin-dive we could not skin-dive you could not skin-dive they could not skin-dive
Forme en V-ing
I could not be skin-diving you could not be skin-diving he could not be skin-diving we could not be skin-diving you could not be skin-diving they could not be skin-diving
Perfect
I could not have skin-dived you could not have skin-dived he could not have skin-dived we could not have skin-dived you could not have skin-dived they could not have skin-dived
Perfect en V-ing
I could not have been skin-diving you could not have been skin-diving he could not have been skin-diving we could not have been skin-diving you could not have been skin-diving they could not have been skin-diving
Forme interrogative
Forme simple
could I skin-dive? could you skin-dive? could he skin-dive? could we skin-dive? could you skin-dive? could they skin-dive?
Forme en V-ing
could I be skin-diving? could you be skin-diving? could he be skin-diving? could we be skin-diving? could you be skin-diving? could they be skin-diving?
Perfect
could I have skin-dived? could you have skin-dived? could he have skin-dived? could we have skin-dived? could you have skin-dived? could they have skin-dived?
Perfect en V-ing
could I have been skin-diving? could you have been skin-diving? could he have been skin-diving? could we have been skin-diving? could you have been skin-diving? could they have been skin-diving?
Forme interro-négative
Forme simple
could I not skin-dive? could you not skin-dive? could he not skin-dive? could we not skin-dive? could you not skin-dive? could they not skin-dive?
Forme en V-ing
could I not be skin-diving? could you not be skin-diving? could he not be skin-diving? could we not be skin-diving? could you not be skin-diving? could they not be skin-diving?
Perfect
could I not have skin-dived? could you not have skin-dived? could he not have skin-dived? could we not have skin-dived? could you not have skin-dived? could they not have skin-dived?
Perfect en V-ing
could I not have been skin-diving? could you not have been skin-diving? could he not have been skin-diving? could we not have been skin-diving? could you not have been skin-diving? could they not have been skin-diving?