must grumble
Verbo regular: grumble - grumbled- grumbled

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com 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	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	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com 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	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 com V-ing 	Perfeito 	Perfeito com 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? 	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-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com 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? 	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?