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 mustn't modernize you mustn't modernize she mustn't modernize we mustn't modernize you mustn't modernize they mustn't modernize
V-ing form
I mustn't be modernizing you mustn't be modernizing she mustn't be modernizing we mustn't be modernizing you mustn't be modernizing they mustn't be modernizing
Perfect
I mustn't have modernized you mustn't have modernized she mustn't have modernized we mustn't have modernized you mustn't have modernized they mustn't have modernized
V-ing perfect
I mustn't have been modernizing you mustn't have been modernizing she mustn't have been modernizing we mustn't have been modernizing you mustn't have been modernizing they mustn't 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
mustn't I modernize? mustn't you modernize? mustn't she modernize? mustn't we modernize? mustn't you modernize? mustn't they modernize?
V-ing form
mustn't I be modernizing? mustn't you be modernizing? mustn't she be modernizing? mustn't we be modernizing? mustn't you be modernizing? mustn't they be modernizing?
Perfect
mustn't I have modernized? mustn't you have modernized? mustn't she have modernized? mustn't we have modernized? mustn't you have modernized? mustn't they have modernized?
V-ing perfect
mustn't I have been modernizing? mustn't you have been modernizing? mustn't she have been modernizing? mustn't we have been modernizing? mustn't you have been modernizing? mustn't they have been modernizing?