I must ret you must ret she must ret we must ret you must ret they must ret
Forma con V-ing
I must be retting you must be retting she must be retting we must be retting you must be retting they must be retting
Perfecto
I must have retted you must have retted she must have retted we must have retted you must have retted they must have retted
Perfecto con V-ing
I must have been retting you must have been retting she must have been retting we must have been retting you must have been retting they must have been retting
Negación
Forma simple
I must not ret you must not ret she must not ret we must not ret you must not ret they must not ret
Forma con V-ing
I must not be retting you must not be retting she must not be retting we must not be retting you must not be retting they must not be retting
Perfecto
I must not have retted you must not have retted she must not have retted we must not have retted you must not have retted they must not have retted
Perfecto con V-ing
I must not have been retting you must not have been retting she must not have been retting we must not have been retting you must not have been retting they must not have been retting
Forma interrogativa
Forma simple
must I ret? must you ret? must she ret? must we ret? must you ret? must they ret?
Forma con V-ing
must I be retting? must you be retting? must she be retting? must we be retting? must you be retting? must they be retting?
Perfecto
must I have retted? must you have retted? must she have retted? must we have retted? must you have retted? must they have retted?
Perfecto con V-ing
must I have been retting? must you have been retting? must she have been retting? must we have been retting? must you have been retting? must they have been retting?
Forma interro-negativa
Forma simple
must I not ret? must you not ret? must she not ret? must we not ret? must you not ret? must they not ret?
Forma con V-ing
must I not be retting? must you not be retting? must she not be retting? must we not be retting? must you not be retting? must they not be retting?
Perfecto
must I not have retted? must you not have retted? must she not have retted? must we not have retted? must you not have retted? must they not have retted?
Perfecto con V-ing
must I not have been retting? must you not have been retting? must she not have been retting? must we not have been retting? must you not have been retting? must they not have been retting?