I must ski you must ski he must ski we must ski you must ski they must ski
Forma com V-ing
I must be skiing you must be skiing he must be skiing we must be skiing you must be skiing they must be skiing
Perfeito
I must have skied you must have skied he must have skied we must have skied you must have skied they must have skied
Perfeito com V-ing
I must have been skiing you must have been skiing he must have been skiing we must have been skiing you must have been skiing they must have been skiing
Negação
Forma simple
I mustn't ski you mustn't ski he mustn't ski we mustn't ski you mustn't ski they mustn't ski
Forma com V-ing
I mustn't be skiing you mustn't be skiing he mustn't be skiing we mustn't be skiing you mustn't be skiing they mustn't be skiing
Perfeito
I mustn't have skied you mustn't have skied he mustn't have skied we mustn't have skied you mustn't have skied they mustn't have skied
Perfeito com V-ing
I mustn't have been skiing you mustn't have been skiing he mustn't have been skiing we mustn't have been skiing you mustn't have been skiing they mustn't have been skiing
Forma interrogativa
Forma simple
must I ski? must you ski? must he ski? must we ski? must you ski? must they ski?
Forma com V-ing
must I be skiing? must you be skiing? must he be skiing? must we be skiing? must you be skiing? must they be skiing?
Perfeito
must I have skied? must you have skied? must he have skied? must we have skied? must you have skied? must they have skied?
Perfeito com V-ing
must I have been skiing? must you have been skiing? must he have been skiing? must we have been skiing? must you have been skiing? must they have been skiing?
Forma interro-Negação
Forma simple
mustn't I ski? mustn't you ski? mustn't he ski? mustn't we ski? mustn't you ski? mustn't they ski?
Forma com V-ing
mustn't I be skiing? mustn't you be skiing? mustn't he be skiing? mustn't we be skiing? mustn't you be skiing? mustn't they be skiing?
Perfeito
mustn't I have skied? mustn't you have skied? mustn't he have skied? mustn't we have skied? mustn't you have skied? mustn't they have skied?
Perfeito com V-ing
mustn't I have been skiing? mustn't you have been skiing? mustn't he have been skiing? mustn't we have been skiing? mustn't you have been skiing? mustn't they have been skiing?