I must unscrew you must unscrew he must unscrew we must unscrew you must unscrew they must unscrew
Forma con V-ing
I must be unscrewing you must be unscrewing he must be unscrewing we must be unscrewing you must be unscrewing they must be unscrewing
Perfecto
I must have unscrewed you must have unscrewed he must have unscrewed we must have unscrewed you must have unscrewed they must have unscrewed
Perfecto con V-ing
I must have been unscrewing you must have been unscrewing he must have been unscrewing we must have been unscrewing you must have been unscrewing they must have been unscrewing
Negación
Forma simple
I must not unscrew you must not unscrew he must not unscrew we must not unscrew you must not unscrew they must not unscrew
Forma con V-ing
I must not be unscrewing you must not be unscrewing he must not be unscrewing we must not be unscrewing you must not be unscrewing they must not be unscrewing
Perfecto
I must not have unscrewed you must not have unscrewed he must not have unscrewed we must not have unscrewed you must not have unscrewed they must not have unscrewed
Perfecto con V-ing
I must not have been unscrewing you must not have been unscrewing he must not have been unscrewing we must not have been unscrewing you must not have been unscrewing they must not have been unscrewing
Forma interrogativa
Forma simple
must I unscrew? must you unscrew? must he unscrew? must we unscrew? must you unscrew? must they unscrew?
Forma con V-ing
must I be unscrewing? must you be unscrewing? must he be unscrewing? must we be unscrewing? must you be unscrewing? must they be unscrewing?
Perfecto
must I have unscrewed? must you have unscrewed? must he have unscrewed? must we have unscrewed? must you have unscrewed? must they have unscrewed?
Perfecto con V-ing
must I have been unscrewing? must you have been unscrewing? must he have been unscrewing? must we have been unscrewing? must you have been unscrewing? must they have been unscrewing?
Forma interro-negativa
Forma simple
must I not unscrew? must you not unscrew? must he not unscrew? must we not unscrew? must you not unscrew? must they not unscrew?
Forma con V-ing
must I not be unscrewing? must you not be unscrewing? must he not be unscrewing? must we not be unscrewing? must you not be unscrewing? must they not be unscrewing?
Perfecto
must I not have unscrewed? must you not have unscrewed? must he not have unscrewed? must we not have unscrewed? must you not have unscrewed? must they not have unscrewed?
Perfecto con V-ing
must I not have been unscrewing? must you not have been unscrewing? must he not have been unscrewing? must we not have been unscrewing? must you not have been unscrewing? must they not have been unscrewing?