could presolve
Verbo regular: presolve - presolved- presolved

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could presolve
you could presolve
she could presolve
we could presolve
you could presolve
they could presolve 	I could be presolving
you could be presolving
she could be presolving
we could be presolving
you could be presolving
they could be presolving	I could have presolved
you could have presolved
she could have presolved
we could have presolved
you could have presolved
they could have presolved	I could have been presolving
you could have been presolving
she could have been presolving
we could have been presolving
you could have been presolving
they could have been presolving	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not presolve
you could not presolve
she could not presolve
we could not presolve
you could not presolve
they could not presolve 	I could not be presolving
you could not be presolving
she could not be presolving
we could not be presolving
you could not be presolving
they could not be presolving	I could not have presolved
you could not have presolved
she could not have presolved
we could not have presolved
you could not have presolved
they could not have presolved	I could not have been presolving
you could not have been presolving
she could not have been presolving
we could not have been presolving
you could not have been presolving
they could not have been presolving	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I presolve?
could you presolve?
could she presolve?
could we presolve?
could you presolve?
could they presolve? 	could I be presolving?
could you be presolving?
could she be presolving?
could we be presolving?
could you be presolving?
could they be presolving? 	could I have presolved?
could you have presolved?
could she have presolved?
could we have presolved?
could you have presolved?
could they have presolved? 	could I have been presolving?
could you have been presolving?
could she have been presolving?
could we have been presolving?
could you have been presolving?
could they have been presolving? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not presolve?
could you not presolve?
could she not presolve?
could we not presolve?
could you not presolve?
could they not presolve? 	could I not be presolving?
could you not be presolving?
could she not be presolving?
could we not be presolving?
could you not be presolving?
could they not be presolving? 	could I not have presolved?
could you not have presolved?
could she not have presolved?
could we not have presolved?
could you not have presolved?
could they not have presolved? 	could I not have been presolving?
could you not have been presolving?
could she not have been presolving?
could we not have been presolving?
could you not have been presolving?
could they not have been presolving?