English verb conjugation
MUST EXPURGATE

Regular verb: expurgate - expurgated - expurgated

Affirmation

Simple form	V-ing form
I must expurgate you must expurgate he must expurgate we must expurgate you must expurgate they must expurgate	I must be expurgating you must be expurgating he must be expurgating we must be expurgating you must be expurgating they must be expurgating
Perfect	V-ing perfect
I must have expurgated you must have expurgated he must have expurgated we must have expurgated you must have expurgated they must have expurgated	I must have been expurgating you must have been expurgating he must have been expurgating we must have been expurgating you must have been expurgating they must have been expurgating

Negation

Simple form	V-ing form
I mustn't expurgate you mustn't expurgate he mustn't expurgate we mustn't expurgate you mustn't expurgate they mustn't expurgate	I mustn't be expurgating you mustn't be expurgating he mustn't be expurgating we mustn't be expurgating you mustn't be expurgating they mustn't be expurgating
Perfect	V-ing perfect
I mustn't have expurgated you mustn't have expurgated he mustn't have expurgated we mustn't have expurgated you mustn't have expurgated they mustn't have expurgated	I mustn't have been expurgating you mustn't have been expurgating he mustn't have been expurgating we mustn't have been expurgating you mustn't have been expurgating they mustn't have been expurgating

Interrogative form

Simple form	V-ing form
must I expurgate? must you expurgate? must he expurgate? must we expurgate? must you expurgate? must they expurgate?	must I be expurgating? must you be expurgating? must he be expurgating? must we be expurgating? must you be expurgating? must they be expurgating?
Perfect	V-ing perfect
must I have expurgated? must you have expurgated? must he have expurgated? must we have expurgated? must you have expurgated? must they have expurgated?	must I have been expurgating? must you have been expurgating? must he have been expurgating? must we have been expurgating? must you have been expurgating? must they have been expurgating?

Interro-negative form

Simple form	V-ing form
mustn't I expurgate? mustn't you expurgate? mustn't he expurgate? mustn't we expurgate? mustn't you expurgate? mustn't they expurgate?	mustn't I be expurgating? mustn't you be expurgating? mustn't he be expurgating? mustn't we be expurgating? mustn't you be expurgating? mustn't they be expurgating?
Perfect	V-ing perfect
mustn't I have expurgated? mustn't you have expurgated? mustn't he have expurgated? mustn't we have expurgated? mustn't you have expurgated? mustn't they have expurgated?	mustn't I have been expurgating? mustn't you have been expurgating? mustn't he have been expurgating? mustn't we have been expurgating? mustn't you have been expurgating? mustn't they have been expurgating?