English verb conjugation
MUST YOO-HOO

Regular verb: yoo-hoo - yoo-hooed - yoo-hooed

Affirmation

Simple form	V-ing form
I must yoo-hoo you must yoo-hoo he must yoo-hoo we must yoo-hoo you must yoo-hoo they must yoo-hoo	I must be yoo-hooing you must be yoo-hooing he must be yoo-hooing we must be yoo-hooing you must be yoo-hooing they must be yoo-hooing
Perfect	V-ing perfect
I must have yoo-hooed you must have yoo-hooed he must have yoo-hooed we must have yoo-hooed you must have yoo-hooed they must have yoo-hooed	I must have been yoo-hooing you must have been yoo-hooing he must have been yoo-hooing we must have been yoo-hooing you must have been yoo-hooing they must have been yoo-hooing

Negation

Simple form	V-ing form
I mustn't yoo-hoo you mustn't yoo-hoo he mustn't yoo-hoo we mustn't yoo-hoo you mustn't yoo-hoo they mustn't yoo-hoo	I mustn't be yoo-hooing you mustn't be yoo-hooing he mustn't be yoo-hooing we mustn't be yoo-hooing you mustn't be yoo-hooing they mustn't be yoo-hooing
Perfect	V-ing perfect
I mustn't have yoo-hooed you mustn't have yoo-hooed he mustn't have yoo-hooed we mustn't have yoo-hooed you mustn't have yoo-hooed they mustn't have yoo-hooed	I mustn't have been yoo-hooing you mustn't have been yoo-hooing he mustn't have been yoo-hooing we mustn't have been yoo-hooing you mustn't have been yoo-hooing they mustn't have been yoo-hooing

Interrogative form

Simple form	V-ing form
must I yoo-hoo? must you yoo-hoo? must he yoo-hoo? must we yoo-hoo? must you yoo-hoo? must they yoo-hoo?	must I be yoo-hooing? must you be yoo-hooing? must he be yoo-hooing? must we be yoo-hooing? must you be yoo-hooing? must they be yoo-hooing?
Perfect	V-ing perfect
must I have yoo-hooed? must you have yoo-hooed? must he have yoo-hooed? must we have yoo-hooed? must you have yoo-hooed? must they have yoo-hooed?	must I have been yoo-hooing? must you have been yoo-hooing? must he have been yoo-hooing? must we have been yoo-hooing? must you have been yoo-hooing? must they have been yoo-hooing?

Interro-negative form

Simple form	V-ing form
mustn't I yoo-hoo? mustn't you yoo-hoo? mustn't he yoo-hoo? mustn't we yoo-hoo? mustn't you yoo-hoo? mustn't they yoo-hoo?	mustn't I be yoo-hooing? mustn't you be yoo-hooing? mustn't he be yoo-hooing? mustn't we be yoo-hooing? mustn't you be yoo-hooing? mustn't they be yoo-hooing?
Perfect	V-ing perfect
mustn't I have yoo-hooed? mustn't you have yoo-hooed? mustn't he have yoo-hooed? mustn't we have yoo-hooed? mustn't you have yoo-hooed? mustn't they have yoo-hooed?	mustn't I have been yoo-hooing? mustn't you have been yoo-hooing? mustn't he have been yoo-hooing? mustn't we have been yoo-hooing? mustn't you have been yoo-hooing? mustn't they have been yoo-hooing?