I must skimp you must skimp she must skimp we must skimp you must skimp they must skimp
Forma con V-ing
I must be skimping you must be skimping she must be skimping we must be skimping you must be skimping they must be skimping
Perfecto
I must have skimped you must have skimped she must have skimped we must have skimped you must have skimped they must have skimped
Perfecto con V-ing
I must have been skimping you must have been skimping she must have been skimping we must have been skimping you must have been skimping they must have been skimping
Negación
Forma simple
I must not skimp you must not skimp she must not skimp we must not skimp you must not skimp they must not skimp
Forma con V-ing
I must not be skimping you must not be skimping she must not be skimping we must not be skimping you must not be skimping they must not be skimping
Perfecto
I must not have skimped you must not have skimped she must not have skimped we must not have skimped you must not have skimped they must not have skimped
Perfecto con V-ing
I must not have been skimping you must not have been skimping she must not have been skimping we must not have been skimping you must not have been skimping they must not have been skimping
Forma interrogativa
Forma simple
must I skimp? must you skimp? must she skimp? must we skimp? must you skimp? must they skimp?
Forma con V-ing
must I be skimping? must you be skimping? must she be skimping? must we be skimping? must you be skimping? must they be skimping?
Perfecto
must I have skimped? must you have skimped? must she have skimped? must we have skimped? must you have skimped? must they have skimped?
Perfecto con V-ing
must I have been skimping? must you have been skimping? must she have been skimping? must we have been skimping? must you have been skimping? must they have been skimping?
Forma interro-negativa
Forma simple
must I not skimp? must you not skimp? must she not skimp? must we not skimp? must you not skimp? must they not skimp?
Forma con V-ing
must I not be skimping? must you not be skimping? must she not be skimping? must we not be skimping? must you not be skimping? must they not be skimping?
Perfecto
must I not have skimped? must you not have skimped? must she not have skimped? must we not have skimped? must you not have skimped? must they not have skimped?
Perfecto con V-ing
must I not have been skimping? must you not have been skimping? must she not have been skimping? must we not have been skimping? must you not have been skimping? must they not have been skimping?