must flunk
Verbe régulier : flunk - flunked- flunked

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must flunk
you must flunk
he must flunk
we must flunk
you must flunk
they must flunk 	I must be flunking
you must be flunking
he must be flunking
we must be flunking
you must be flunking
they must be flunking	I must have flunked
you must have flunked
he must have flunked
we must have flunked
you must have flunked
they must have flunked	I must have been flunking
you must have been flunking
he must have been flunking
we must have been flunking
you must have been flunking
they must have been flunking	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't flunk
you mustn't flunk
he mustn't flunk
we mustn't flunk
you mustn't flunk
they mustn't flunk 	I mustn't be flunking
you mustn't be flunking
he mustn't be flunking
we mustn't be flunking
you mustn't be flunking
they mustn't be flunking	I mustn't have flunked
you mustn't have flunked
he mustn't have flunked
we mustn't have flunked
you mustn't have flunked
they mustn't have flunked	I mustn't have been flunking
you mustn't have been flunking
he mustn't have been flunking
we mustn't have been flunking
you mustn't have been flunking
they mustn't have been flunking	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I flunk?
must you flunk?
must he flunk?
must we flunk?
must you flunk?
must they flunk? 	must I be flunking?
must you be flunking?
must he be flunking?
must we be flunking?
must you be flunking?
must they be flunking? 	must I have flunked?
must you have flunked?
must he have flunked?
must we have flunked?
must you have flunked?
must they have flunked? 	must I have been flunking?
must you have been flunking?
must he have been flunking?
must we have been flunking?
must you have been flunking?
must they have been flunking? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I flunk?
mustn't you flunk?
mustn't he flunk?
mustn't we flunk?
mustn't you flunk?
mustn't they flunk? 	mustn't I be flunking?
mustn't you be flunking?
mustn't he be flunking?
mustn't we be flunking?
mustn't you be flunking?
mustn't they be flunking? 	mustn't I have flunked?
mustn't you have flunked?
mustn't he have flunked?
mustn't we have flunked?
mustn't you have flunked?
mustn't they have flunked? 	mustn't I have been flunking?
mustn't you have been flunking?
mustn't he have been flunking?
mustn't we have been flunking?
mustn't you have been flunking?
mustn't they have been flunking?