could sex
Verbo regular: sex - sexed- sexed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could sex
you could sex
she could sex
we could sex
you could sex
they could sex 	I could be sexing
you could be sexing
she could be sexing
we could be sexing
you could be sexing
they could be sexing	I could have sexed
you could have sexed
she could have sexed
we could have sexed
you could have sexed
they could have sexed	I could have been sexing
you could have been sexing
she could have been sexing
we could have been sexing
you could have been sexing
they could have been sexing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not sex
you could not sex
she could not sex
we could not sex
you could not sex
they could not sex 	I could not be sexing
you could not be sexing
she could not be sexing
we could not be sexing
you could not be sexing
they could not be sexing	I could not have sexed
you could not have sexed
she could not have sexed
we could not have sexed
you could not have sexed
they could not have sexed	I could not have been sexing
you could not have been sexing
she could not have been sexing
we could not have been sexing
you could not have been sexing
they could not have been sexing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I sex?
could you sex?
could she sex?
could we sex?
could you sex?
could they sex? 	could I be sexing?
could you be sexing?
could she be sexing?
could we be sexing?
could you be sexing?
could they be sexing? 	could I have sexed?
could you have sexed?
could she have sexed?
could we have sexed?
could you have sexed?
could they have sexed? 	could I have been sexing?
could you have been sexing?
could she have been sexing?
could we have been sexing?
could you have been sexing?
could they have been sexing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not sex?
could you not sex?
could she not sex?
could we not sex?
could you not sex?
could they not sex? 	could I not be sexing?
could you not be sexing?
could she not be sexing?
could we not be sexing?
could you not be sexing?
could they not be sexing? 	could I not have sexed?
could you not have sexed?
could she not have sexed?
could we not have sexed?
could you not have sexed?
could they not have sexed? 	could I not have been sexing?
could you not have been sexing?
could she not have been sexing?
could we not have been sexing?
could you not have been sexing?
could they not have been sexing?