English verb conjugation
MUST SKIDOO

Regular verb: skidoo - skidooed - skidooed

Affirmation

Simple form	V-ing form
I must skidoo you must skidoo he must skidoo we must skidoo you must skidoo they must skidoo	I must be skidooing you must be skidooing he must be skidooing we must be skidooing you must be skidooing they must be skidooing
Perfect	V-ing perfect
I must have skidooed you must have skidooed he must have skidooed we must have skidooed you must have skidooed they must have skidooed	I must have been skidooing you must have been skidooing he must have been skidooing we must have been skidooing you must have been skidooing they must have been skidooing

Negation

Simple form	V-ing form
I mustn't skidoo you mustn't skidoo he mustn't skidoo we mustn't skidoo you mustn't skidoo they mustn't skidoo	I mustn't be skidooing you mustn't be skidooing he mustn't be skidooing we mustn't be skidooing you mustn't be skidooing they mustn't be skidooing
Perfect	V-ing perfect
I mustn't have skidooed you mustn't have skidooed he mustn't have skidooed we mustn't have skidooed you mustn't have skidooed they mustn't have skidooed	I mustn't have been skidooing you mustn't have been skidooing he mustn't have been skidooing we mustn't have been skidooing you mustn't have been skidooing they mustn't have been skidooing

Interrogative form

Simple form	V-ing form
must I skidoo? must you skidoo? must he skidoo? must we skidoo? must you skidoo? must they skidoo?	must I be skidooing? must you be skidooing? must he be skidooing? must we be skidooing? must you be skidooing? must they be skidooing?
Perfect	V-ing perfect
must I have skidooed? must you have skidooed? must he have skidooed? must we have skidooed? must you have skidooed? must they have skidooed?	must I have been skidooing? must you have been skidooing? must he have been skidooing? must we have been skidooing? must you have been skidooing? must they have been skidooing?

Interro-negative form

Simple form	V-ing form
mustn't I skidoo? mustn't you skidoo? mustn't he skidoo? mustn't we skidoo? mustn't you skidoo? mustn't they skidoo?	mustn't I be skidooing? mustn't you be skidooing? mustn't he be skidooing? mustn't we be skidooing? mustn't you be skidooing? mustn't they be skidooing?
Perfect	V-ing perfect
mustn't I have skidooed? mustn't you have skidooed? mustn't he have skidooed? mustn't we have skidooed? mustn't you have skidooed? mustn't they have skidooed?	mustn't I have been skidooing? mustn't you have been skidooing? mustn't he have been skidooing? mustn't we have been skidooing? mustn't you have been skidooing? mustn't they have been skidooing?