English verb conjugation
MUST GREATEN

Regular verb: greaten - greatened - greatened

Affirmation

Simple form	V-ing form
I must greaten you must greaten he must greaten we must greaten you must greaten they must greaten	I must be greatening you must be greatening he must be greatening we must be greatening you must be greatening they must be greatening
Perfect	V-ing perfect
I must have greatened you must have greatened he must have greatened we must have greatened you must have greatened they must have greatened	I must have been greatening you must have been greatening he must have been greatening we must have been greatening you must have been greatening they must have been greatening

Negation

Simple form	V-ing form
I must not greaten you must not greaten he must not greaten we must not greaten you must not greaten they must not greaten	I must not be greatening you must not be greatening he must not be greatening we must not be greatening you must not be greatening they must not be greatening
Perfect	V-ing perfect
I must not have greatened you must not have greatened he must not have greatened we must not have greatened you must not have greatened they must not have greatened	I must not have been greatening you must not have been greatening he must not have been greatening we must not have been greatening you must not have been greatening they must not have been greatening

Interrogative form

Simple form	V-ing form
must I greaten? must you greaten? must he greaten? must we greaten? must you greaten? must they greaten?	must I be greatening? must you be greatening? must he be greatening? must we be greatening? must you be greatening? must they be greatening?
Perfect	V-ing perfect
must I have greatened? must you have greatened? must he have greatened? must we have greatened? must you have greatened? must they have greatened?	must I have been greatening? must you have been greatening? must he have been greatening? must we have been greatening? must you have been greatening? must they have been greatening?

Interro-negative form

Simple form	V-ing form
must I not greaten? must you not greaten? must he not greaten? must we not greaten? must you not greaten? must they not greaten?	must I not be greatening? must you not be greatening? must he not be greatening? must we not be greatening? must you not be greatening? must they not be greatening?
Perfect	V-ing perfect
must I not have greatened? must you not have greatened? must he not have greatened? must we not have greatened? must you not have greatened? must they not have greatened?	must I not have been greatening? must you not have been greatening? must he not have been greatening? must we not have been greatening? must you not have been greatening? must they not have been greatening?