I could backstroke you could backstroke she could backstroke we could backstroke you could backstroke they could backstroke
Forme en V-ing
I could be backstroking you could be backstroking she could be backstroking we could be backstroking you could be backstroking they could be backstroking
Perfect
I could have backstroked you could have backstroked she could have backstroked we could have backstroked you could have backstroked they could have backstroked
Perfect en V-ing
I could have been backstroking you could have been backstroking she could have been backstroking we could have been backstroking you could have been backstroking they could have been backstroking
Négation
Forme simple
I could not backstroke you could not backstroke she could not backstroke we could not backstroke you could not backstroke they could not backstroke
Forme en V-ing
I could not be backstroking you could not be backstroking she could not be backstroking we could not be backstroking you could not be backstroking they could not be backstroking
Perfect
I could not have backstroked you could not have backstroked she could not have backstroked we could not have backstroked you could not have backstroked they could not have backstroked
Perfect en V-ing
I could not have been backstroking you could not have been backstroking she could not have been backstroking we could not have been backstroking you could not have been backstroking they could not have been backstroking
Forme interrogative
Forme simple
could I backstroke? could you backstroke? could she backstroke? could we backstroke? could you backstroke? could they backstroke?
Forme en V-ing
could I be backstroking? could you be backstroking? could she be backstroking? could we be backstroking? could you be backstroking? could they be backstroking?
Perfect
could I have backstroked? could you have backstroked? could she have backstroked? could we have backstroked? could you have backstroked? could they have backstroked?
Perfect en V-ing
could I have been backstroking? could you have been backstroking? could she have been backstroking? could we have been backstroking? could you have been backstroking? could they have been backstroking?
Forme interro-négative
Forme simple
could I not backstroke? could you not backstroke? could she not backstroke? could we not backstroke? could you not backstroke? could they not backstroke?
Forme en V-ing
could I not be backstroking? could you not be backstroking? could she not be backstroking? could we not be backstroking? could you not be backstroking? could they not be backstroking?
Perfect
could I not have backstroked? could you not have backstroked? could she not have backstroked? could we not have backstroked? could you not have backstroked? could they not have backstroked?
Perfect en V-ing
could I not have been backstroking? could you not have been backstroking? could she not have been backstroking? could we not have been backstroking? could you not have been backstroking? could they not have been backstroking?