must sex
Verbo regular: sex - sexed- sexed

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

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't sex
you mustn't sex
she mustn't sex
we mustn't sex
you mustn't sex
they mustn't sex 	I mustn't be sexing
you mustn't be sexing
she mustn't be sexing
we mustn't be sexing
you mustn't be sexing
they mustn't be sexing	I mustn't have sexed
you mustn't have sexed
she mustn't have sexed
we mustn't have sexed
you mustn't have sexed
they mustn't have sexed	I mustn't have been sexing
you mustn't have been sexing
she mustn't have been sexing
we mustn't have been sexing
you mustn't have been sexing
they mustn't have been sexing	

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

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