must balk
Verbo regular: balk - balked- balked

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must balk
you must balk
he must balk
we must balk
you must balk
they must balk 	I must be balking
you must be balking
he must be balking
we must be balking
you must be balking
they must be balking	I must have balked
you must have balked
he must have balked
we must have balked
you must have balked
they must have balked	I must have been balking
you must have been balking
he must have been balking
we must have been balking
you must have been balking
they must have been balking	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't balk
you mustn't balk
he mustn't balk
we mustn't balk
you mustn't balk
they mustn't balk 	I mustn't be balking
you mustn't be balking
he mustn't be balking
we mustn't be balking
you mustn't be balking
they mustn't be balking	I mustn't have balked
you mustn't have balked
he mustn't have balked
we mustn't have balked
you mustn't have balked
they mustn't have balked	I mustn't have been balking
you mustn't have been balking
he mustn't have been balking
we mustn't have been balking
you mustn't have been balking
they mustn't have been balking	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I balk?
must you balk?
must he balk?
must we balk?
must you balk?
must they balk? 	must I be balking?
must you be balking?
must he be balking?
must we be balking?
must you be balking?
must they be balking? 	must I have balked?
must you have balked?
must he have balked?
must we have balked?
must you have balked?
must they have balked? 	must I have been balking?
must you have been balking?
must he have been balking?
must we have been balking?
must you have been balking?
must they have been balking? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I balk?
mustn't you balk?
mustn't he balk?
mustn't we balk?
mustn't you balk?
mustn't they balk? 	mustn't I be balking?
mustn't you be balking?
mustn't he be balking?
mustn't we be balking?
mustn't you be balking?
mustn't they be balking? 	mustn't I have balked?
mustn't you have balked?
mustn't he have balked?
mustn't we have balked?
mustn't you have balked?
mustn't they have balked? 	mustn't I have been balking?
mustn't you have been balking?
mustn't he have been balking?
mustn't we have been balking?
mustn't you have been balking?
mustn't they have been balking?