could backsolve
Verbe régulier : backsolve - backsolved- backsolved

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could backsolve
you could backsolve
she could backsolve
we could backsolve
you could backsolve
they could backsolve 	I could be backsolving
you could be backsolving
she could be backsolving
we could be backsolving
you could be backsolving
they could be backsolving	I could have backsolved
you could have backsolved
she could have backsolved
we could have backsolved
you could have backsolved
they could have backsolved	I could have been backsolving
you could have been backsolving
she could have been backsolving
we could have been backsolving
you could have been backsolving
they could have been backsolving	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could not backsolve
you could not backsolve
she could not backsolve
we could not backsolve
you could not backsolve
they could not backsolve 	I could not be backsolving
you could not be backsolving
she could not be backsolving
we could not be backsolving
you could not be backsolving
they could not be backsolving	I could not have backsolved
you could not have backsolved
she could not have backsolved
we could not have backsolved
you could not have backsolved
they could not have backsolved	I could not have been backsolving
you could not have been backsolving
she could not have been backsolving
we could not have been backsolving
you could not have been backsolving
they could not have been backsolving	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I backsolve?
could you backsolve?
could she backsolve?
could we backsolve?
could you backsolve?
could they backsolve? 	could I be backsolving?
could you be backsolving?
could she be backsolving?
could we be backsolving?
could you be backsolving?
could they be backsolving? 	could I have backsolved?
could you have backsolved?
could she have backsolved?
could we have backsolved?
could you have backsolved?
could they have backsolved? 	could I have been backsolving?
could you have been backsolving?
could she have been backsolving?
could we have been backsolving?
could you have been backsolving?
could they have been backsolving? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I not backsolve?
could you not backsolve?
could she not backsolve?
could we not backsolve?
could you not backsolve?
could they not backsolve? 	could I not be backsolving?
could you not be backsolving?
could she not be backsolving?
could we not be backsolving?
could you not be backsolving?
could they not be backsolving? 	could I not have backsolved?
could you not have backsolved?
could she not have backsolved?
could we not have backsolved?
could you not have backsolved?
could they not have backsolved? 	could I not have been backsolving?
could you not have been backsolving?
could she not have been backsolving?
could we not have been backsolving?
could you not have been backsolving?
could they not have been backsolving?