English verb conjugation
MUST FLUMMOX

Regular verb: flummox - flummoxed - flummoxed

Affirmation

Simple form	V-ing form
I must flummox you must flummox she must flummox we must flummox you must flummox they must flummox	I must be flummoxing you must be flummoxing she must be flummoxing we must be flummoxing you must be flummoxing they must be flummoxing
Perfect	V-ing perfect
I must have flummoxed you must have flummoxed she must have flummoxed we must have flummoxed you must have flummoxed they must have flummoxed	I must have been flummoxing you must have been flummoxing she must have been flummoxing we must have been flummoxing you must have been flummoxing they must have been flummoxing

Negation

Simple form	V-ing form
I mustn't flummox you mustn't flummox she mustn't flummox we mustn't flummox you mustn't flummox they mustn't flummox	I mustn't be flummoxing you mustn't be flummoxing she mustn't be flummoxing we mustn't be flummoxing you mustn't be flummoxing they mustn't be flummoxing
Perfect	V-ing perfect
I mustn't have flummoxed you mustn't have flummoxed she mustn't have flummoxed we mustn't have flummoxed you mustn't have flummoxed they mustn't have flummoxed	I mustn't have been flummoxing you mustn't have been flummoxing she mustn't have been flummoxing we mustn't have been flummoxing you mustn't have been flummoxing they mustn't have been flummoxing

Interrogative form

Simple form	V-ing form
must I flummox? must you flummox? must she flummox? must we flummox? must you flummox? must they flummox?	must I be flummoxing? must you be flummoxing? must she be flummoxing? must we be flummoxing? must you be flummoxing? must they be flummoxing?
Perfect	V-ing perfect
must I have flummoxed? must you have flummoxed? must she have flummoxed? must we have flummoxed? must you have flummoxed? must they have flummoxed?	must I have been flummoxing? must you have been flummoxing? must she have been flummoxing? must we have been flummoxing? must you have been flummoxing? must they have been flummoxing?

Interro-negative form

Simple form	V-ing form
mustn't I flummox? mustn't you flummox? mustn't she flummox? mustn't we flummox? mustn't you flummox? mustn't they flummox?	mustn't I be flummoxing? mustn't you be flummoxing? mustn't she be flummoxing? mustn't we be flummoxing? mustn't you be flummoxing? mustn't they be flummoxing?
Perfect	V-ing perfect
mustn't I have flummoxed? mustn't you have flummoxed? mustn't she have flummoxed? mustn't we have flummoxed? mustn't you have flummoxed? mustn't they have flummoxed?	mustn't I have been flummoxing? mustn't you have been flummoxing? mustn't she have been flummoxing? mustn't we have been flummoxing? mustn't you have been flummoxing? mustn't they have been flummoxing?