I must crumple you must crumple she must crumple we must crumple you must crumple they must crumple
Forma con V-ing
I must be crumpling you must be crumpling she must be crumpling we must be crumpling you must be crumpling they must be crumpling
Perfecto
I must have crumpled you must have crumpled she must have crumpled we must have crumpled you must have crumpled they must have crumpled
Perfecto con V-ing
I must have been crumpling you must have been crumpling she must have been crumpling we must have been crumpling you must have been crumpling they must have been crumpling
Negación
Forma simple
I must not crumple you must not crumple she must not crumple we must not crumple you must not crumple they must not crumple
Forma con V-ing
I must not be crumpling you must not be crumpling she must not be crumpling we must not be crumpling you must not be crumpling they must not be crumpling
Perfecto
I must not have crumpled you must not have crumpled she must not have crumpled we must not have crumpled you must not have crumpled they must not have crumpled
Perfecto con V-ing
I must not have been crumpling you must not have been crumpling she must not have been crumpling we must not have been crumpling you must not have been crumpling they must not have been crumpling
Forma interrogativa
Forma simple
must I crumple? must you crumple? must she crumple? must we crumple? must you crumple? must they crumple?
Forma con V-ing
must I be crumpling? must you be crumpling? must she be crumpling? must we be crumpling? must you be crumpling? must they be crumpling?
Perfecto
must I have crumpled? must you have crumpled? must she have crumpled? must we have crumpled? must you have crumpled? must they have crumpled?
Perfecto con V-ing
must I have been crumpling? must you have been crumpling? must she have been crumpling? must we have been crumpling? must you have been crumpling? must they have been crumpling?
Forma interro-negativa
Forma simple
must I not crumple? must you not crumple? must she not crumple? must we not crumple? must you not crumple? must they not crumple?
Forma con V-ing
must I not be crumpling? must you not be crumpling? must she not be crumpling? must we not be crumpling? must you not be crumpling? must they not be crumpling?
Perfecto
must I not have crumpled? must you not have crumpled? must she not have crumpled? must we not have crumpled? must you not have crumpled? must they not have crumpled?
Perfecto con V-ing
must I not have been crumpling? must you not have been crumpling? must she not have been crumpling? must we not have been crumpling? must you not have been crumpling? must they not have been crumpling?