English verb conjugation
MUST CERTIFICATE

Regular verb: certificate - certificated - certificated

Affirmation

Simple form	V-ing form
I must certificate you must certificate he must certificate we must certificate you must certificate they must certificate	I must be certificating you must be certificating he 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 he 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 he 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 must not certificate you must not certificate he must not certificate we must not certificate you must not certificate they must not certificate	I must not be certificating you must not be certificating he must not be certificating we must not be certificating you must not be certificating they must not be certificating
Perfect	V-ing perfect
I must not have certificated you must not have certificated he must not have certificated we must not have certificated you must not have certificated they must not have certificated	I must not have been certificating you must not have been certificating he must not have been certificating we must not have been certificating you must not have been certificating they must not have been certificating

Interrogative form

Simple form	V-ing form
must I certificate? must you certificate? must he certificate? must we certificate? must you certificate? must they certificate?	must I be certificating? must you be certificating? must he 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 he 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 he 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
must I not certificate? must you not certificate? must he not certificate? must we not certificate? must you not certificate? must they not certificate?	must I not be certificating? must you not be certificating? must he not be certificating? must we not be certificating? must you not be certificating? must they not be certificating?
Perfect	V-ing perfect
must I not have certificated? must you not have certificated? must he not have certificated? must we not have certificated? must you not have certificated? must they not have certificated?	must I not have been certificating? must you not have been certificating? must he not have been certificating? must we not have been certificating? must you not have been certificating? must they not have been certificating?