English verb conjugation
MUST CERTIFICATE

Regular verb: certificate - certificated - certificated

Affirmation

Simple form	V-ing form
I must certificate you must certificate she must certificate we must certificate you must certificate they must certificate	I must be certificating you must be certificating she must be certificating we must be certificating you must be certificating they must be certificating
Perfect	V-ing perfect
I must have certificated you must have certificated she must have certificated we must have certificated you must have certificated they must have certificated	I must have been certificating you must have been certificating she must have been certificating we must have been certificating you must have been certificating they must have been certificating

Negation

Simple form	V-ing form
I mustn't certificate you mustn't certificate she mustn't certificate we mustn't certificate you mustn't certificate they mustn't certificate	I mustn't be certificating you mustn't be certificating she mustn't be certificating we mustn't be certificating you mustn't be certificating they mustn't be certificating
Perfect	V-ing perfect
I mustn't have certificated you mustn't have certificated she mustn't have certificated we mustn't have certificated you mustn't have certificated they mustn't have certificated	I mustn't have been certificating you mustn't have been certificating she mustn't have been certificating we mustn't have been certificating you mustn't have been certificating they mustn't have been certificating

Interrogative form

Simple form	V-ing form
must I certificate? must you certificate? must she certificate? must we certificate? must you certificate? must they certificate?	must I be certificating? must you be certificating? must she be certificating? must we be certificating? must you be certificating? must they be certificating?
Perfect	V-ing perfect
must I have certificated? must you have certificated? must she have certificated? must we have certificated? must you have certificated? must they have certificated?	must I have been certificating? must you have been certificating? must she have been certificating? must we have been certificating? must you have been certificating? must they have been certificating?

Interro-negative form

Simple form	V-ing form
mustn't I certificate? mustn't you certificate? mustn't she certificate? mustn't we certificate? mustn't you certificate? mustn't they certificate?	mustn't I be certificating? mustn't you be certificating? mustn't she be certificating? mustn't we be certificating? mustn't you be certificating? mustn't they be certificating?
Perfect	V-ing perfect
mustn't I have certificated? mustn't you have certificated? mustn't she have certificated? mustn't we have certificated? mustn't you have certificated? mustn't they have certificated?	mustn't I have been certificating? mustn't you have been certificating? mustn't she have been certificating? mustn't we have been certificating? mustn't you have been certificating? mustn't they have been certificating?