English verb conjugation
MUST CELEBRATE

Regular verb: celebrate - celebrated - celebrated

Affirmation

Simple form	V-ing form
I must celebrate you must celebrate he must celebrate we must celebrate you must celebrate they must celebrate	I must be celebrating you must be celebrating he must be celebrating we must be celebrating you must be celebrating they must be celebrating
Perfect	V-ing perfect
I must have celebrated you must have celebrated he must have celebrated we must have celebrated you must have celebrated they must have celebrated	I must have been celebrating you must have been celebrating he must have been celebrating we must have been celebrating you must have been celebrating they must have been celebrating

Negation

Simple form	V-ing form
I mustn't celebrate you mustn't celebrate he mustn't celebrate we mustn't celebrate you mustn't celebrate they mustn't celebrate	I mustn't be celebrating you mustn't be celebrating he mustn't be celebrating we mustn't be celebrating you mustn't be celebrating they mustn't be celebrating
Perfect	V-ing perfect
I mustn't have celebrated you mustn't have celebrated he mustn't have celebrated we mustn't have celebrated you mustn't have celebrated they mustn't have celebrated	I mustn't have been celebrating you mustn't have been celebrating he mustn't have been celebrating we mustn't have been celebrating you mustn't have been celebrating they mustn't have been celebrating

Interrogative form

Simple form	V-ing form
must I celebrate? must you celebrate? must he celebrate? must we celebrate? must you celebrate? must they celebrate?	must I be celebrating? must you be celebrating? must he be celebrating? must we be celebrating? must you be celebrating? must they be celebrating?
Perfect	V-ing perfect
must I have celebrated? must you have celebrated? must he have celebrated? must we have celebrated? must you have celebrated? must they have celebrated?	must I have been celebrating? must you have been celebrating? must he have been celebrating? must we have been celebrating? must you have been celebrating? must they have been celebrating?

Interro-negative form

Simple form	V-ing form
mustn't I celebrate? mustn't you celebrate? mustn't he celebrate? mustn't we celebrate? mustn't you celebrate? mustn't they celebrate?	mustn't I be celebrating? mustn't you be celebrating? mustn't he be celebrating? mustn't we be celebrating? mustn't you be celebrating? mustn't they be celebrating?
Perfect	V-ing perfect
mustn't I have celebrated? mustn't you have celebrated? mustn't he have celebrated? mustn't we have celebrated? mustn't you have celebrated? mustn't they have celebrated?	mustn't I have been celebrating? mustn't you have been celebrating? mustn't he have been celebrating? mustn't we have been celebrating? mustn't you have been celebrating? mustn't they have been celebrating?