could concoct
Verbo regular: concoct - concocted- concocted

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could concoct
you could concoct
she could concoct
we could concoct
you could concoct
they could concoct 	I could be concocting
you could be concocting
she could be concocting
we could be concocting
you could be concocting
they could be concocting	I could have concocted
you could have concocted
she could have concocted
we could have concocted
you could have concocted
they could have concocted	I could have been concocting
you could have been concocting
she could have been concocting
we could have been concocting
you could have been concocting
they could have been concocting	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not concoct
you could not concoct
she could not concoct
we could not concoct
you could not concoct
they could not concoct 	I could not be concocting
you could not be concocting
she could not be concocting
we could not be concocting
you could not be concocting
they could not be concocting	I could not have concocted
you could not have concocted
she could not have concocted
we could not have concocted
you could not have concocted
they could not have concocted	I could not have been concocting
you could not have been concocting
she could not have been concocting
we could not have been concocting
you could not have been concocting
they could not have been concocting	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I concoct?
could you concoct?
could she concoct?
could we concoct?
could you concoct?
could they concoct? 	could I be concocting?
could you be concocting?
could she be concocting?
could we be concocting?
could you be concocting?
could they be concocting? 	could I have concocted?
could you have concocted?
could she have concocted?
could we have concocted?
could you have concocted?
could they have concocted? 	could I have been concocting?
could you have been concocting?
could she have been concocting?
could we have been concocting?
could you have been concocting?
could they have been concocting? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not concoct?
could you not concoct?
could she not concoct?
could we not concoct?
could you not concoct?
could they not concoct? 	could I not be concocting?
could you not be concocting?
could she not be concocting?
could we not be concocting?
could you not be concocting?
could they not be concocting? 	could I not have concocted?
could you not have concocted?
could she not have concocted?
could we not have concocted?
could you not have concocted?
could they not have concocted? 	could I not have been concocting?
could you not have been concocting?
could she not have been concocting?
could we not have been concocting?
could you not have been concocting?
could they not have been concocting?