could backstroke
Verbe régulier : backstroke - backstroked- backstroked

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could backstroke
you could backstroke
she could backstroke
we could backstroke
you could backstroke
they could backstroke 	I could be backstroking
you could be backstroking
she could be backstroking
we could be backstroking
you could be backstroking
they could be backstroking	I could have backstroked
you could have backstroked
she could have backstroked
we could have backstroked
you could have backstroked
they could have backstroked	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 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't backstroke
you couldn't backstroke
she couldn't backstroke
we couldn't backstroke
you couldn't backstroke
they couldn't backstroke 	I couldn't be backstroking
you couldn't be backstroking
she couldn't be backstroking
we couldn't be backstroking
you couldn't be backstroking
they couldn't be backstroking	I couldn't have backstroked
you couldn't have backstroked
she couldn't have backstroked
we couldn't have backstroked
you couldn't have backstroked
they couldn't have backstroked	I couldn't have been backstroking
you couldn't have been backstroking
she couldn't have been backstroking
we couldn't have been backstroking
you couldn't have been backstroking
they couldn't have been backstroking	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I backstroke?
could you backstroke?
could she backstroke?
could we backstroke?
could you backstroke?
could they backstroke? 	could I be backstroking?
could you be backstroking?
could she be backstroking?
could we be backstroking?
could you be backstroking?
could they be backstroking? 	could I have backstroked?
could you have backstroked?
could she have backstroked?
could we have backstroked?
could you have backstroked?
could they have backstroked? 	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 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I backstroke?
couldn't you backstroke?
couldn't she backstroke?
couldn't we backstroke?
couldn't you backstroke?
couldn't they backstroke? 	couldn't I be backstroking?
couldn't you be backstroking?
couldn't she be backstroking?
couldn't we be backstroking?
couldn't you be backstroking?
couldn't they be backstroking? 	couldn't I have backstroked?
couldn't you have backstroked?
couldn't she have backstroked?
couldn't we have backstroked?
couldn't you have backstroked?
couldn't they have backstroked? 	couldn't I have been backstroking?
couldn't you have been backstroking?
couldn't she have been backstroking?
couldn't we have been backstroking?
couldn't you have been backstroking?
couldn't they have been backstroking?