could overstudy
Verbo regular: overstudy - overstudied- overstudied

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could overstudy
you could overstudy
she could overstudy
we could overstudy
you could overstudy
they could overstudy 	I could be overstudying
you could be overstudying
she could be overstudying
we could be overstudying
you could be overstudying
they could be overstudying	I could have overstudied
you could have overstudied
she could have overstudied
we could have overstudied
you could have overstudied
they could have overstudied	I could have been overstudying
you could have been overstudying
she could have been overstudying
we could have been overstudying
you could have been overstudying
they could have been overstudying	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not overstudy
you could not overstudy
she could not overstudy
we could not overstudy
you could not overstudy
they could not overstudy 	I could not be overstudying
you could not be overstudying
she could not be overstudying
we could not be overstudying
you could not be overstudying
they could not be overstudying	I could not have overstudied
you could not have overstudied
she could not have overstudied
we could not have overstudied
you could not have overstudied
they could not have overstudied	I could not have been overstudying
you could not have been overstudying
she could not have been overstudying
we could not have been overstudying
you could not have been overstudying
they could not have been overstudying	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I overstudy?
could you overstudy?
could she overstudy?
could we overstudy?
could you overstudy?
could they overstudy? 	could I be overstudying?
could you be overstudying?
could she be overstudying?
could we be overstudying?
could you be overstudying?
could they be overstudying? 	could I have overstudied?
could you have overstudied?
could she have overstudied?
could we have overstudied?
could you have overstudied?
could they have overstudied? 	could I have been overstudying?
could you have been overstudying?
could she have been overstudying?
could we have been overstudying?
could you have been overstudying?
could they have been overstudying? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not overstudy?
could you not overstudy?
could she not overstudy?
could we not overstudy?
could you not overstudy?
could they not overstudy? 	could I not be overstudying?
could you not be overstudying?
could she not be overstudying?
could we not be overstudying?
could you not be overstudying?
could they not be overstudying? 	could I not have overstudied?
could you not have overstudied?
could she not have overstudied?
could we not have overstudied?
could you not have overstudied?
could they not have overstudied? 	could I not have been overstudying?
could you not have been overstudying?
could she not have been overstudying?
could we not have been overstudying?
could you not have been overstudying?
could they not have been overstudying?