English verb conjugation
MUST SKITTER

Regular verb: skitter - skittered - skittered

Affirmation

Simple form	V-ing form
I must skitter you must skitter he must skitter we must skitter you must skitter they must skitter	I must be skittering you must be skittering he must be skittering we must be skittering you must be skittering they must be skittering
Perfect	V-ing perfect
I must have skittered you must have skittered he must have skittered we must have skittered you must have skittered they must have skittered	I must have been skittering you must have been skittering he must have been skittering we must have been skittering you must have been skittering they must have been skittering

Negation

Simple form	V-ing form
I mustn't skitter you mustn't skitter he mustn't skitter we mustn't skitter you mustn't skitter they mustn't skitter	I mustn't be skittering you mustn't be skittering he mustn't be skittering we mustn't be skittering you mustn't be skittering they mustn't be skittering
Perfect	V-ing perfect
I mustn't have skittered you mustn't have skittered he mustn't have skittered we mustn't have skittered you mustn't have skittered they mustn't have skittered	I mustn't have been skittering you mustn't have been skittering he mustn't have been skittering we mustn't have been skittering you mustn't have been skittering they mustn't have been skittering

Interrogative form

Simple form	V-ing form
must I skitter? must you skitter? must he skitter? must we skitter? must you skitter? must they skitter?	must I be skittering? must you be skittering? must he be skittering? must we be skittering? must you be skittering? must they be skittering?
Perfect	V-ing perfect
must I have skittered? must you have skittered? must he have skittered? must we have skittered? must you have skittered? must they have skittered?	must I have been skittering? must you have been skittering? must he have been skittering? must we have been skittering? must you have been skittering? must they have been skittering?

Interro-negative form

Simple form	V-ing form
mustn't I skitter? mustn't you skitter? mustn't he skitter? mustn't we skitter? mustn't you skitter? mustn't they skitter?	mustn't I be skittering? mustn't you be skittering? mustn't he be skittering? mustn't we be skittering? mustn't you be skittering? mustn't they be skittering?
Perfect	V-ing perfect
mustn't I have skittered? mustn't you have skittered? mustn't he have skittered? mustn't we have skittered? mustn't you have skittered? mustn't they have skittered?	mustn't I have been skittering? mustn't you have been skittering? mustn't he have been skittering? mustn't we have been skittering? mustn't you have been skittering? mustn't they have been skittering?