English verb conjugation
MUST FLUSTER

Regular verb: fluster - flustered - flustered

Affirmation

Simple form	V-ing form
I must fluster you must fluster he must fluster we must fluster you must fluster they must fluster	I must be flustering you must be flustering he must be flustering we must be flustering you must be flustering they must be flustering
Perfect	V-ing perfect
I must have flustered you must have flustered he must have flustered we must have flustered you must have flustered they must have flustered	I must have been flustering you must have been flustering he must have been flustering we must have been flustering you must have been flustering they must have been flustering

Negation

Simple form	V-ing form
I mustn't fluster you mustn't fluster he mustn't fluster we mustn't fluster you mustn't fluster they mustn't fluster	I mustn't be flustering you mustn't be flustering he mustn't be flustering we mustn't be flustering you mustn't be flustering they mustn't be flustering
Perfect	V-ing perfect
I mustn't have flustered you mustn't have flustered he mustn't have flustered we mustn't have flustered you mustn't have flustered they mustn't have flustered	I mustn't have been flustering you mustn't have been flustering he mustn't have been flustering we mustn't have been flustering you mustn't have been flustering they mustn't have been flustering

Interrogative form

Simple form	V-ing form
must I fluster? must you fluster? must he fluster? must we fluster? must you fluster? must they fluster?	must I be flustering? must you be flustering? must he be flustering? must we be flustering? must you be flustering? must they be flustering?
Perfect	V-ing perfect
must I have flustered? must you have flustered? must he have flustered? must we have flustered? must you have flustered? must they have flustered?	must I have been flustering? must you have been flustering? must he have been flustering? must we have been flustering? must you have been flustering? must they have been flustering?

Interro-negative form

Simple form	V-ing form
mustn't I fluster? mustn't you fluster? mustn't he fluster? mustn't we fluster? mustn't you fluster? mustn't they fluster?	mustn't I be flustering? mustn't you be flustering? mustn't he be flustering? mustn't we be flustering? mustn't you be flustering? mustn't they be flustering?
Perfect	V-ing perfect
mustn't I have flustered? mustn't you have flustered? mustn't he have flustered? mustn't we have flustered? mustn't you have flustered? mustn't they have flustered?	mustn't I have been flustering? mustn't you have been flustering? mustn't he have been flustering? mustn't we have been flustering? mustn't you have been flustering? mustn't they have been flustering?