English verb conjugation
MUST FLUNK

Regular verb: flunk - flunked - flunked

Affirmation

Simple form	V-ing form
I must flunk you must flunk she must flunk we must flunk you must flunk they must flunk	I must be flunking you must be flunking she 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 she 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 she 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 she 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 she 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 she 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 she 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 she flunk? must we flunk? must you flunk? must they flunk?	must I be flunking? must you be flunking? must she 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 she 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 she 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 she 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 she 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 she 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 she not have been flunking? must we not have been flunking? must you not have been flunking? must they not have been flunking?