English verb conjugation
MUST FITTER

Regular verb: fitter - fittered - fittered

Affirmation

Simple form	V-ing form
I must fitter you must fitter he must fitter we must fitter you must fitter they must fitter	I must be fittering you must be fittering he must be fittering we must be fittering you must be fittering they must be fittering
Perfect	V-ing perfect
I must have fittered you must have fittered he must have fittered we must have fittered you must have fittered they must have fittered	I must have been fittering you must have been fittering he must have been fittering we must have been fittering you must have been fittering they must have been fittering

Negation

Simple form	V-ing form
I mustn't fitter you mustn't fitter he mustn't fitter we mustn't fitter you mustn't fitter they mustn't fitter	I mustn't be fittering you mustn't be fittering he mustn't be fittering we mustn't be fittering you mustn't be fittering they mustn't be fittering
Perfect	V-ing perfect
I mustn't have fittered you mustn't have fittered he mustn't have fittered we mustn't have fittered you mustn't have fittered they mustn't have fittered	I mustn't have been fittering you mustn't have been fittering he mustn't have been fittering we mustn't have been fittering you mustn't have been fittering they mustn't have been fittering

Interrogative form

Simple form	V-ing form
must I fitter? must you fitter? must he fitter? must we fitter? must you fitter? must they fitter?	must I be fittering? must you be fittering? must he be fittering? must we be fittering? must you be fittering? must they be fittering?
Perfect	V-ing perfect
must I have fittered? must you have fittered? must he have fittered? must we have fittered? must you have fittered? must they have fittered?	must I have been fittering? must you have been fittering? must he have been fittering? must we have been fittering? must you have been fittering? must they have been fittering?

Interro-negative form

Simple form	V-ing form
mustn't I fitter? mustn't you fitter? mustn't he fitter? mustn't we fitter? mustn't you fitter? mustn't they fitter?	mustn't I be fittering? mustn't you be fittering? mustn't he be fittering? mustn't we be fittering? mustn't you be fittering? mustn't they be fittering?
Perfect	V-ing perfect
mustn't I have fittered? mustn't you have fittered? mustn't he have fittered? mustn't we have fittered? mustn't you have fittered? mustn't they have fittered?	mustn't I have been fittering? mustn't you have been fittering? mustn't he have been fittering? mustn't we have been fittering? mustn't you have been fittering? mustn't they have been fittering?