English verb conjugation
MUST DECEREBRATE

Regular verb: decerebrate - decerebrated - decerebrated

Affirmation

Simple form	V-ing form
I must decerebrate you must decerebrate she must decerebrate we must decerebrate you must decerebrate they must decerebrate	I must be decerebrating you must be decerebrating she must be decerebrating we must be decerebrating you must be decerebrating they must be decerebrating
Perfect	V-ing perfect
I must have decerebrated you must have decerebrated she must have decerebrated we must have decerebrated you must have decerebrated they must have decerebrated	I must have been decerebrating you must have been decerebrating she must have been decerebrating we must have been decerebrating you must have been decerebrating they must have been decerebrating

Negation

Simple form	V-ing form
I mustn't decerebrate you mustn't decerebrate she mustn't decerebrate we mustn't decerebrate you mustn't decerebrate they mustn't decerebrate	I mustn't be decerebrating you mustn't be decerebrating she mustn't be decerebrating we mustn't be decerebrating you mustn't be decerebrating they mustn't be decerebrating
Perfect	V-ing perfect
I mustn't have decerebrated you mustn't have decerebrated she mustn't have decerebrated we mustn't have decerebrated you mustn't have decerebrated they mustn't have decerebrated	I mustn't have been decerebrating you mustn't have been decerebrating she mustn't have been decerebrating we mustn't have been decerebrating you mustn't have been decerebrating they mustn't have been decerebrating

Interrogative form

Simple form	V-ing form
must I decerebrate? must you decerebrate? must she decerebrate? must we decerebrate? must you decerebrate? must they decerebrate?	must I be decerebrating? must you be decerebrating? must she be decerebrating? must we be decerebrating? must you be decerebrating? must they be decerebrating?
Perfect	V-ing perfect
must I have decerebrated? must you have decerebrated? must she have decerebrated? must we have decerebrated? must you have decerebrated? must they have decerebrated?	must I have been decerebrating? must you have been decerebrating? must she have been decerebrating? must we have been decerebrating? must you have been decerebrating? must they have been decerebrating?

Interro-negative form

Simple form	V-ing form
mustn't I decerebrate? mustn't you decerebrate? mustn't she decerebrate? mustn't we decerebrate? mustn't you decerebrate? mustn't they decerebrate?	mustn't I be decerebrating? mustn't you be decerebrating? mustn't she be decerebrating? mustn't we be decerebrating? mustn't you be decerebrating? mustn't they be decerebrating?
Perfect	V-ing perfect
mustn't I have decerebrated? mustn't you have decerebrated? mustn't she have decerebrated? mustn't we have decerebrated? mustn't you have decerebrated? mustn't they have decerebrated?	mustn't I have been decerebrating? mustn't you have been decerebrating? mustn't she have been decerebrating? mustn't we have been decerebrating? mustn't you have been decerebrating? mustn't they have been decerebrating?