must grump
Verbo regular: grump - grumped- grumped

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must grump
you must grump
he must grump
we must grump
you must grump
they must grump 	I must be grumping
you must be grumping
he must be grumping
we must be grumping
you must be grumping
they must be grumping	I must have grumped
you must have grumped
he must have grumped
we must have grumped
you must have grumped
they must have grumped	I must have been grumping
you must have been grumping
he must have been grumping
we must have been grumping
you must have been grumping
they must have been grumping	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't grump
you mustn't grump
he mustn't grump
we mustn't grump
you mustn't grump
they mustn't grump 	I mustn't be grumping
you mustn't be grumping
he mustn't be grumping
we mustn't be grumping
you mustn't be grumping
they mustn't be grumping	I mustn't have grumped
you mustn't have grumped
he mustn't have grumped
we mustn't have grumped
you mustn't have grumped
they mustn't have grumped	I mustn't have been grumping
you mustn't have been grumping
he mustn't have been grumping
we mustn't have been grumping
you mustn't have been grumping
they mustn't have been grumping	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I grump?
must you grump?
must he grump?
must we grump?
must you grump?
must they grump? 	must I be grumping?
must you be grumping?
must he be grumping?
must we be grumping?
must you be grumping?
must they be grumping? 	must I have grumped?
must you have grumped?
must he have grumped?
must we have grumped?
must you have grumped?
must they have grumped? 	must I have been grumping?
must you have been grumping?
must he have been grumping?
must we have been grumping?
must you have been grumping?
must they have been grumping? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I grump?
mustn't you grump?
mustn't he grump?
mustn't we grump?
mustn't you grump?
mustn't they grump? 	mustn't I be grumping?
mustn't you be grumping?
mustn't he be grumping?
mustn't we be grumping?
mustn't you be grumping?
mustn't they be grumping? 	mustn't I have grumped?
mustn't you have grumped?
mustn't he have grumped?
mustn't we have grumped?
mustn't you have grumped?
mustn't they have grumped? 	mustn't I have been grumping?
mustn't you have been grumping?
mustn't he have been grumping?
mustn't we have been grumping?
mustn't you have been grumping?
mustn't they have been grumping?