could exert
Verbo regular: exert - exerted- exerted

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could exert
you could exert
she could exert
we could exert
you could exert
they could exert 	I could be exerting
you could be exerting
she could be exerting
we could be exerting
you could be exerting
they could be exerting	I could have exerted
you could have exerted
she could have exerted
we could have exerted
you could have exerted
they could have exerted	I could have been exerting
you could have been exerting
she could have been exerting
we could have been exerting
you could have been exerting
they could have been exerting	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not exert
you could not exert
she could not exert
we could not exert
you could not exert
they could not exert 	I could not be exerting
you could not be exerting
she could not be exerting
we could not be exerting
you could not be exerting
they could not be exerting	I could not have exerted
you could not have exerted
she could not have exerted
we could not have exerted
you could not have exerted
they could not have exerted	I could not have been exerting
you could not have been exerting
she could not have been exerting
we could not have been exerting
you could not have been exerting
they could not have been exerting	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I exert?
could you exert?
could she exert?
could we exert?
could you exert?
could they exert? 	could I be exerting?
could you be exerting?
could she be exerting?
could we be exerting?
could you be exerting?
could they be exerting? 	could I have exerted?
could you have exerted?
could she have exerted?
could we have exerted?
could you have exerted?
could they have exerted? 	could I have been exerting?
could you have been exerting?
could she have been exerting?
could we have been exerting?
could you have been exerting?
could they have been exerting? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not exert?
could you not exert?
could she not exert?
could we not exert?
could you not exert?
could they not exert? 	could I not be exerting?
could you not be exerting?
could she not be exerting?
could we not be exerting?
could you not be exerting?
could they not be exerting? 	could I not have exerted?
could you not have exerted?
could she not have exerted?
could we not have exerted?
could you not have exerted?
could they not have exerted? 	could I not have been exerting?
could you not have been exerting?
could she not have been exerting?
could we not have been exerting?
could you not have been exerting?
could they not have been exerting?