I must strum you must strum he must strum we must strum you must strum they must strum
Forma con V-ing
I must be strumming you must be strumming he must be strumming we must be strumming you must be strumming they must be strumming
Perfecto
I must have strummed you must have strummed he must have strummed we must have strummed you must have strummed they must have strummed
Perfecto con V-ing
I must have been strumming you must have been strumming he must have been strumming we must have been strumming you must have been strumming they must have been strumming
Negación
Forma simple
I mustn't strum you mustn't strum he mustn't strum we mustn't strum you mustn't strum they mustn't strum
Forma con V-ing
I mustn't be strumming you mustn't be strumming he mustn't be strumming we mustn't be strumming you mustn't be strumming they mustn't be strumming
Perfecto
I mustn't have strummed you mustn't have strummed he mustn't have strummed we mustn't have strummed you mustn't have strummed they mustn't have strummed
Perfecto con V-ing
I mustn't have been strumming you mustn't have been strumming he mustn't have been strumming we mustn't have been strumming you mustn't have been strumming they mustn't have been strumming
Forma interrogativa
Forma simple
must I strum? must you strum? must he strum? must we strum? must you strum? must they strum?
Forma con V-ing
must I be strumming? must you be strumming? must he be strumming? must we be strumming? must you be strumming? must they be strumming?
Perfecto
must I have strummed? must you have strummed? must he have strummed? must we have strummed? must you have strummed? must they have strummed?
Perfecto con V-ing
must I have been strumming? must you have been strumming? must he have been strumming? must we have been strumming? must you have been strumming? must they have been strumming?
Forma interro-negativa
Forma simple
mustn't I strum? mustn't you strum? mustn't he strum? mustn't we strum? mustn't you strum? mustn't they strum?
Forma con V-ing
mustn't I be strumming? mustn't you be strumming? mustn't he be strumming? mustn't we be strumming? mustn't you be strumming? mustn't they be strumming?
Perfecto
mustn't I have strummed? mustn't you have strummed? mustn't he have strummed? mustn't we have strummed? mustn't you have strummed? mustn't they have strummed?
Perfecto con V-ing
mustn't I have been strumming? mustn't you have been strumming? mustn't he have been strumming? mustn't we have been strumming? mustn't you have been strumming? mustn't they have been strumming?