I must reply you must reply she must reply we must reply you must reply they must reply
Forma con V-ing
I must be replying you must be replying she must be replying we must be replying you must be replying they must be replying
Perfecto
I must have replied you must have replied she must have replied we must have replied you must have replied they must have replied
Perfecto con V-ing
I must have been replying you must have been replying she must have been replying we must have been replying you must have been replying they must have been replying
Negación
Forma simple
I must not reply you must not reply she must not reply we must not reply you must not reply they must not reply
Forma con V-ing
I must not be replying you must not be replying she must not be replying we must not be replying you must not be replying they must not be replying
Perfecto
I must not have replied you must not have replied she must not have replied we must not have replied you must not have replied they must not have replied
Perfecto con V-ing
I must not have been replying you must not have been replying she must not have been replying we must not have been replying you must not have been replying they must not have been replying
Forma interrogativa
Forma simple
must I reply? must you reply? must she reply? must we reply? must you reply? must they reply?
Forma con V-ing
must I be replying? must you be replying? must she be replying? must we be replying? must you be replying? must they be replying?
Perfecto
must I have replied? must you have replied? must she have replied? must we have replied? must you have replied? must they have replied?
Perfecto con V-ing
must I have been replying? must you have been replying? must she have been replying? must we have been replying? must you have been replying? must they have been replying?
Forma interro-negativa
Forma simple
must I not reply? must you not reply? must she not reply? must we not reply? must you not reply? must they not reply?
Forma con V-ing
must I not be replying? must you not be replying? must she not be replying? must we not be replying? must you not be replying? must they not be replying?
Perfecto
must I not have replied? must you not have replied? must she not have replied? must we not have replied? must you not have replied? must they not have replied?
Perfecto con V-ing
must I not have been replying? must you not have been replying? must she not have been replying? must we not have been replying? must you not have been replying? must they not have been replying?