I must modernize you must modernize she must modernize we must modernize you must modernize they must modernize
V-ing form
I must be modernizing you must be modernizing she must be modernizing we must be modernizing you must be modernizing they must be modernizing
Perfect
I must have modernized you must have modernized she must have modernized we must have modernized you must have modernized they must have modernized
V-ing perfect
I must have been modernizing you must have been modernizing she must have been modernizing we must have been modernizing you must have been modernizing they must have been modernizing
Negation
Simple form
I must not modernize you must not modernize she must not modernize we must not modernize you must not modernize they must not modernize
V-ing form
I must not be modernizing you must not be modernizing she must not be modernizing we must not be modernizing you must not be modernizing they must not be modernizing
Perfect
I must not have modernized you must not have modernized she must not have modernized we must not have modernized you must not have modernized they must not have modernized
V-ing perfect
I must not have been modernizing you must not have been modernizing she must not have been modernizing we must not have been modernizing you must not have been modernizing they must not have been modernizing
Interrogative form
Simple form
must I modernize? must you modernize? must she modernize? must we modernize? must you modernize? must they modernize?
V-ing form
must I be modernizing? must you be modernizing? must she be modernizing? must we be modernizing? must you be modernizing? must they be modernizing?
Perfect
must I have modernized? must you have modernized? must she have modernized? must we have modernized? must you have modernized? must they have modernized?
V-ing perfect
must I have been modernizing? must you have been modernizing? must she have been modernizing? must we have been modernizing? must you have been modernizing? must they have been modernizing?
Interro-negative form
Simple form
must I not modernize? must you not modernize? must she not modernize? must we not modernize? must you not modernize? must they not modernize?
V-ing form
must I not be modernizing? must you not be modernizing? must she not be modernizing? must we not be modernizing? must you not be modernizing? must they not be modernizing?
Perfect
must I not have modernized? must you not have modernized? must she not have modernized? must we not have modernized? must you not have modernized? must they not have modernized?
V-ing perfect
must I not have been modernizing? must you not have been modernizing? must she not have been modernizing? must we not have been modernizing? must you not have been modernizing? must they not have been modernizing?