must flunk
Verbo regular: flunk - flunked- flunked

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con 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	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not flunk
you must not flunk
he must not flunk
we must not flunk
you must not flunk
they must not flunk 	I must not be flunking
you must not be flunking
he must not be flunking
we must not be flunking
you must not be flunking
they must not be flunking	I must not have flunked
you must not have flunked
he must not have flunked
we must not have flunked
you must not have flunked
they must not have flunked	I must not have been flunking
you must not have been flunking
he must not have been flunking
we must not have been flunking
you must not have been flunking
they must not have been flunking	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con 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? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not flunk?
must you not flunk?
must he not flunk?
must we not flunk?
must you not flunk?
must they not flunk? 	must I not be flunking?
must you not be flunking?
must he not be flunking?
must we not be flunking?
must you not be flunking?
must they not be flunking? 	must I not have flunked?
must you not have flunked?
must he not have flunked?
must we not have flunked?
must you not have flunked?
must they not have flunked? 	must I not have been flunking?
must you not have been flunking?
must he not have been flunking?
must we not have been flunking?
must you not have been flunking?
must they not have been flunking?