must expire
Verbo regular: expire - expired- expired

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must expire
you must expire
he must expire
we must expire
you must expire
they must expire 	I must be expiring
you must be expiring
he must be expiring
we must be expiring
you must be expiring
they must be expiring	I must have expired
you must have expired
he must have expired
we must have expired
you must have expired
they must have expired	I must have been expiring
you must have been expiring
he must have been expiring
we must have been expiring
you must have been expiring
they must have been expiring	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't expire
you mustn't expire
he mustn't expire
we mustn't expire
you mustn't expire
they mustn't expire 	I mustn't be expiring
you mustn't be expiring
he mustn't be expiring
we mustn't be expiring
you mustn't be expiring
they mustn't be expiring	I mustn't have expired
you mustn't have expired
he mustn't have expired
we mustn't have expired
you mustn't have expired
they mustn't have expired	I mustn't have been expiring
you mustn't have been expiring
he mustn't have been expiring
we mustn't have been expiring
you mustn't have been expiring
they mustn't have been expiring	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I expire?
must you expire?
must he expire?
must we expire?
must you expire?
must they expire? 	must I be expiring?
must you be expiring?
must he be expiring?
must we be expiring?
must you be expiring?
must they be expiring? 	must I have expired?
must you have expired?
must he have expired?
must we have expired?
must you have expired?
must they have expired? 	must I have been expiring?
must you have been expiring?
must he have been expiring?
must we have been expiring?
must you have been expiring?
must they have been expiring? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I expire?
mustn't you expire?
mustn't he expire?
mustn't we expire?
mustn't you expire?
mustn't they expire? 	mustn't I be expiring?
mustn't you be expiring?
mustn't he be expiring?
mustn't we be expiring?
mustn't you be expiring?
mustn't they be expiring? 	mustn't I have expired?
mustn't you have expired?
mustn't he have expired?
mustn't we have expired?
mustn't you have expired?
mustn't they have expired? 	mustn't I have been expiring?
mustn't you have been expiring?
mustn't he have been expiring?
mustn't we have been expiring?
mustn't you have been expiring?
mustn't they have been expiring?