English verb conjugation
MUST FLUNK

Regular verb: flunk - flunked - flunked

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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

Negation

Simple form	V-ing form
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
Perfect	V-ing perfect
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

Interrogative form

Simple form	V-ing form
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?
Perfect	V-ing perfect
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?

Interro-negative form

Simple form	V-ing form
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?
Perfect	V-ing perfect
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?