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 must not celebrate you must not celebrate he must not celebrate we must not celebrate you must not celebrate they must not celebrate	I must not be celebrating you must not be celebrating he must not be celebrating we must not be celebrating you must not be celebrating they must not be celebrating
Perfect	V-ing perfect
I must not have celebrated you must not have celebrated he must not have celebrated we must not have celebrated you must not have celebrated they must not have celebrated	I must not have been celebrating you must not have been celebrating he must not have been celebrating we must not have been celebrating you must not have been celebrating they must not 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
must I not celebrate? must you not celebrate? must he not celebrate? must we not celebrate? must you not celebrate? must they not celebrate?	must I not be celebrating? must you not be celebrating? must he not be celebrating? must we not be celebrating? must you not be celebrating? must they not be celebrating?
Perfect	V-ing perfect
must I not have celebrated? must you not have celebrated? must he not have celebrated? must we not have celebrated? must you not have celebrated? must they not have celebrated?	must I not have been celebrating? must you not have been celebrating? must he not have been celebrating? must we not have been celebrating? must you not have been celebrating? must they not have been celebrating?