Conjugación del verbo inglés
MUST GRUMBLE

Verbo regular: grumble - grumbled - grumbled

Afirmación

Forma simple	Forma con V-ing
I must grumble you must grumble he must grumble we must grumble you must grumble they must grumble	I must be grumbling you must be grumbling he must be grumbling we must be grumbling you must be grumbling they must be grumbling
Perfecto	Perfecto con V-ing
I must have grumbled you must have grumbled he must have grumbled we must have grumbled you must have grumbled they must have grumbled	I must have been grumbling you must have been grumbling he must have been grumbling we must have been grumbling you must have been grumbling they must have been grumbling

Negación

Forma simple	Forma con V-ing
I mustn't grumble you mustn't grumble he mustn't grumble we mustn't grumble you mustn't grumble they mustn't grumble	I mustn't be grumbling you mustn't be grumbling he mustn't be grumbling we mustn't be grumbling you mustn't be grumbling they mustn't be grumbling
Perfecto	Perfecto con V-ing
I mustn't have grumbled you mustn't have grumbled he mustn't have grumbled we mustn't have grumbled you mustn't have grumbled they mustn't have grumbled	I mustn't have been grumbling you mustn't have been grumbling he mustn't have been grumbling we mustn't have been grumbling you mustn't have been grumbling they mustn't have been grumbling

Forma interrogativa

Forma simple	Forma con V-ing
must I grumble? must you grumble? must he grumble? must we grumble? must you grumble? must they grumble?	must I be grumbling? must you be grumbling? must he be grumbling? must we be grumbling? must you be grumbling? must they be grumbling?
Perfecto	Perfecto con V-ing
must I have grumbled? must you have grumbled? must he have grumbled? must we have grumbled? must you have grumbled? must they have grumbled?	must I have been grumbling? must you have been grumbling? must he have been grumbling? must we have been grumbling? must you have been grumbling? must they have been grumbling?

Forma interro-negativa

Forma simple	Forma con V-ing
mustn't I grumble? mustn't you grumble? mustn't he grumble? mustn't we grumble? mustn't you grumble? mustn't they grumble?	mustn't I be grumbling? mustn't you be grumbling? mustn't he be grumbling? mustn't we be grumbling? mustn't you be grumbling? mustn't they be grumbling?
Perfecto	Perfecto con V-ing
mustn't I have grumbled? mustn't you have grumbled? mustn't he have grumbled? mustn't we have grumbled? mustn't you have grumbled? mustn't they have grumbled?	mustn't I have been grumbling? mustn't you have been grumbling? mustn't he have been grumbling? mustn't we have been grumbling? mustn't you have been grumbling? mustn't they have been grumbling?