English verb conjugation
MUST FRITTER

Regular verb: fritter - frittered - frittered

Affirmation

Simple form	V-ing form
I must fritter you must fritter he must fritter we must fritter you must fritter they must fritter	I must be frittering you must be frittering he must be frittering we must be frittering you must be frittering they must be frittering
Perfect	V-ing perfect
I must have frittered you must have frittered he must have frittered we must have frittered you must have frittered they must have frittered	I must have been frittering you must have been frittering he must have been frittering we must have been frittering you must have been frittering they must have been frittering

Negation

Simple form	V-ing form
I mustn't fritter you mustn't fritter he mustn't fritter we mustn't fritter you mustn't fritter they mustn't fritter	I mustn't be frittering you mustn't be frittering he mustn't be frittering we mustn't be frittering you mustn't be frittering they mustn't be frittering
Perfect	V-ing perfect
I mustn't have frittered you mustn't have frittered he mustn't have frittered we mustn't have frittered you mustn't have frittered they mustn't have frittered	I mustn't have been frittering you mustn't have been frittering he mustn't have been frittering we mustn't have been frittering you mustn't have been frittering they mustn't have been frittering

Interrogative form

Simple form	V-ing form
must I fritter? must you fritter? must he fritter? must we fritter? must you fritter? must they fritter?	must I be frittering? must you be frittering? must he be frittering? must we be frittering? must you be frittering? must they be frittering?
Perfect	V-ing perfect
must I have frittered? must you have frittered? must he have frittered? must we have frittered? must you have frittered? must they have frittered?	must I have been frittering? must you have been frittering? must he have been frittering? must we have been frittering? must you have been frittering? must they have been frittering?

Interro-negative form

Simple form	V-ing form
mustn't I fritter? mustn't you fritter? mustn't he fritter? mustn't we fritter? mustn't you fritter? mustn't they fritter?	mustn't I be frittering? mustn't you be frittering? mustn't he be frittering? mustn't we be frittering? mustn't you be frittering? mustn't they be frittering?
Perfect	V-ing perfect
mustn't I have frittered? mustn't you have frittered? mustn't he have frittered? mustn't we have frittered? mustn't you have frittered? mustn't they have frittered?	mustn't I have been frittering? mustn't you have been frittering? mustn't he have been frittering? mustn't we have been frittering? mustn't you have been frittering? mustn't they have been frittering?