I must unscrew you must unscrew she must unscrew we must unscrew you must unscrew they must unscrew
Forma con V-ing
I must be unscrewing you must be unscrewing she must be unscrewing we must be unscrewing you must be unscrewing they must be unscrewing
Perfecto
I must have unscrewed you must have unscrewed she 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 she must have been unscrewing we must have been unscrewing you must have been unscrewing they must have been unscrewing
Negación
Forma simple
I mustn't unscrew you mustn't unscrew she mustn't unscrew we mustn't unscrew you mustn't unscrew they mustn't unscrew
Forma con V-ing
I mustn't be unscrewing you mustn't be unscrewing she mustn't be unscrewing we mustn't be unscrewing you mustn't be unscrewing they mustn't be unscrewing
Perfecto
I mustn't have unscrewed you mustn't have unscrewed she mustn't have unscrewed we mustn't have unscrewed you mustn't have unscrewed they mustn't have unscrewed
Perfecto con V-ing
I mustn't have been unscrewing you mustn't have been unscrewing she mustn't have been unscrewing we mustn't have been unscrewing you mustn't have been unscrewing they mustn't have been unscrewing
Forma interrogativa
Forma simple
must I unscrew? must you unscrew? must she unscrew? must we unscrew? must you unscrew? must they unscrew?
Forma con V-ing
must I be unscrewing? must you be unscrewing? must she be unscrewing? must we be unscrewing? must you be unscrewing? must they be unscrewing?
Perfecto
must I have unscrewed? must you have unscrewed? must she 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 she have been unscrewing? must we have been unscrewing? must you have been unscrewing? must they have been unscrewing?
Forma interro-negativa
Forma simple
mustn't I unscrew? mustn't you unscrew? mustn't she unscrew? mustn't we unscrew? mustn't you unscrew? mustn't they unscrew?
Forma con V-ing
mustn't I be unscrewing? mustn't you be unscrewing? mustn't she be unscrewing? mustn't we be unscrewing? mustn't you be unscrewing? mustn't they be unscrewing?
Perfecto
mustn't I have unscrewed? mustn't you have unscrewed? mustn't she have unscrewed? mustn't we have unscrewed? mustn't you have unscrewed? mustn't they have unscrewed?
Perfecto con V-ing
mustn't I have been unscrewing? mustn't you have been unscrewing? mustn't she have been unscrewing? mustn't we have been unscrewing? mustn't you have been unscrewing? mustn't they have been unscrewing?