must discard
Verbo regular: discard - discarded- discarded

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must discard
you must discard
she must discard
we must discard
you must discard
they must discard 	I must be discarding
you must be discarding
she must be discarding
we must be discarding
you must be discarding
they must be discarding	I must have discarded
you must have discarded
she must have discarded
we must have discarded
you must have discarded
they must have discarded	I must have been discarding
you must have been discarding
she must have been discarding
we must have been discarding
you must have been discarding
they must have been discarding	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't discard
you mustn't discard
she mustn't discard
we mustn't discard
you mustn't discard
they mustn't discard 	I mustn't be discarding
you mustn't be discarding
she mustn't be discarding
we mustn't be discarding
you mustn't be discarding
they mustn't be discarding	I mustn't have discarded
you mustn't have discarded
she mustn't have discarded
we mustn't have discarded
you mustn't have discarded
they mustn't have discarded	I mustn't have been discarding
you mustn't have been discarding
she mustn't have been discarding
we mustn't have been discarding
you mustn't have been discarding
they mustn't have been discarding	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I discard?
must you discard?
must she discard?
must we discard?
must you discard?
must they discard? 	must I be discarding?
must you be discarding?
must she be discarding?
must we be discarding?
must you be discarding?
must they be discarding? 	must I have discarded?
must you have discarded?
must she have discarded?
must we have discarded?
must you have discarded?
must they have discarded? 	must I have been discarding?
must you have been discarding?
must she have been discarding?
must we have been discarding?
must you have been discarding?
must they have been discarding? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I discard?
mustn't you discard?
mustn't she discard?
mustn't we discard?
mustn't you discard?
mustn't they discard? 	mustn't I be discarding?
mustn't you be discarding?
mustn't she be discarding?
mustn't we be discarding?
mustn't you be discarding?
mustn't they be discarding? 	mustn't I have discarded?
mustn't you have discarded?
mustn't she have discarded?
mustn't we have discarded?
mustn't you have discarded?
mustn't they have discarded? 	mustn't I have been discarding?
mustn't you have been discarding?
mustn't she have been discarding?
mustn't we have been discarding?
mustn't you have been discarding?
mustn't they have been discarding?