must fork
Verbo regular: fork - forked- forked

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must fork
you must fork
he must fork
we must fork
you must fork
they must fork 	I must be forking
you must be forking
he must be forking
we must be forking
you must be forking
they must be forking	I must have forked
you must have forked
he must have forked
we must have forked
you must have forked
they must have forked	I must have been forking
you must have been forking
he must have been forking
we must have been forking
you must have been forking
they must have been forking	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't fork
you mustn't fork
he mustn't fork
we mustn't fork
you mustn't fork
they mustn't fork 	I mustn't be forking
you mustn't be forking
he mustn't be forking
we mustn't be forking
you mustn't be forking
they mustn't be forking	I mustn't have forked
you mustn't have forked
he mustn't have forked
we mustn't have forked
you mustn't have forked
they mustn't have forked	I mustn't have been forking
you mustn't have been forking
he mustn't have been forking
we mustn't have been forking
you mustn't have been forking
they mustn't have been forking	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I fork?
must you fork?
must he fork?
must we fork?
must you fork?
must they fork? 	must I be forking?
must you be forking?
must he be forking?
must we be forking?
must you be forking?
must they be forking? 	must I have forked?
must you have forked?
must he have forked?
must we have forked?
must you have forked?
must they have forked? 	must I have been forking?
must you have been forking?
must he have been forking?
must we have been forking?
must you have been forking?
must they have been forking? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I fork?
mustn't you fork?
mustn't he fork?
mustn't we fork?
mustn't you fork?
mustn't they fork? 	mustn't I be forking?
mustn't you be forking?
mustn't he be forking?
mustn't we be forking?
mustn't you be forking?
mustn't they be forking? 	mustn't I have forked?
mustn't you have forked?
mustn't he have forked?
mustn't we have forked?
mustn't you have forked?
mustn't they have forked? 	mustn't I have been forking?
mustn't you have been forking?
mustn't he have been forking?
mustn't we have been forking?
mustn't you have been forking?
mustn't they have been forking?