must flag
Verbo regular: flag - flagged- flagged

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must flag
you must flag
he must flag
we must flag
you must flag
they must flag 	I must be flagging
you must be flagging
he must be flagging
we must be flagging
you must be flagging
they must be flagging	I must have flagged
you must have flagged
he must have flagged
we must have flagged
you must have flagged
they must have flagged	I must have been flagging
you must have been flagging
he must have been flagging
we must have been flagging
you must have been flagging
they must have been flagging	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't flag
you mustn't flag
he mustn't flag
we mustn't flag
you mustn't flag
they mustn't flag 	I mustn't be flagging
you mustn't be flagging
he mustn't be flagging
we mustn't be flagging
you mustn't be flagging
they mustn't be flagging	I mustn't have flagged
you mustn't have flagged
he mustn't have flagged
we mustn't have flagged
you mustn't have flagged
they mustn't have flagged	I mustn't have been flagging
you mustn't have been flagging
he mustn't have been flagging
we mustn't have been flagging
you mustn't have been flagging
they mustn't have been flagging	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I flag?
must you flag?
must he flag?
must we flag?
must you flag?
must they flag? 	must I be flagging?
must you be flagging?
must he be flagging?
must we be flagging?
must you be flagging?
must they be flagging? 	must I have flagged?
must you have flagged?
must he have flagged?
must we have flagged?
must you have flagged?
must they have flagged? 	must I have been flagging?
must you have been flagging?
must he have been flagging?
must we have been flagging?
must you have been flagging?
must they have been flagging? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I flag?
mustn't you flag?
mustn't he flag?
mustn't we flag?
mustn't you flag?
mustn't they flag? 	mustn't I be flagging?
mustn't you be flagging?
mustn't he be flagging?
mustn't we be flagging?
mustn't you be flagging?
mustn't they be flagging? 	mustn't I have flagged?
mustn't you have flagged?
mustn't he have flagged?
mustn't we have flagged?
mustn't you have flagged?
mustn't they have flagged? 	mustn't I have been flagging?
mustn't you have been flagging?
mustn't he have been flagging?
mustn't we have been flagging?
mustn't you have been flagging?
mustn't they have been flagging?