must delay
Verbo regular: delay - delayed- delayed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must delay
you must delay
he must delay
we must delay
you must delay
they must delay 	I must be delaying
you must be delaying
he must be delaying
we must be delaying
you must be delaying
they must be delaying	I must have delayed
you must have delayed
he must have delayed
we must have delayed
you must have delayed
they must have delayed	I must have been delaying
you must have been delaying
he must have been delaying
we must have been delaying
you must have been delaying
they must have been delaying	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't delay
you mustn't delay
he mustn't delay
we mustn't delay
you mustn't delay
they mustn't delay 	I mustn't be delaying
you mustn't be delaying
he mustn't be delaying
we mustn't be delaying
you mustn't be delaying
they mustn't be delaying	I mustn't have delayed
you mustn't have delayed
he mustn't have delayed
we mustn't have delayed
you mustn't have delayed
they mustn't have delayed	I mustn't have been delaying
you mustn't have been delaying
he mustn't have been delaying
we mustn't have been delaying
you mustn't have been delaying
they mustn't have been delaying	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I delay?
must you delay?
must he delay?
must we delay?
must you delay?
must they delay? 	must I be delaying?
must you be delaying?
must he be delaying?
must we be delaying?
must you be delaying?
must they be delaying? 	must I have delayed?
must you have delayed?
must he have delayed?
must we have delayed?
must you have delayed?
must they have delayed? 	must I have been delaying?
must you have been delaying?
must he have been delaying?
must we have been delaying?
must you have been delaying?
must they have been delaying? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I delay?
mustn't you delay?
mustn't he delay?
mustn't we delay?
mustn't you delay?
mustn't they delay? 	mustn't I be delaying?
mustn't you be delaying?
mustn't he be delaying?
mustn't we be delaying?
mustn't you be delaying?
mustn't they be delaying? 	mustn't I have delayed?
mustn't you have delayed?
mustn't he have delayed?
mustn't we have delayed?
mustn't you have delayed?
mustn't they have delayed? 	mustn't I have been delaying?
mustn't you have been delaying?
mustn't he have been delaying?
mustn't we have been delaying?
mustn't you have been delaying?
mustn't they have been delaying?