I must imitate you must imitate he must imitate we must imitate you must imitate they must imitate
V-ing form
I must be imitating you must be imitating he must be imitating we must be imitating you must be imitating they must be imitating
Perfect
I must have imitated you must have imitated he must have imitated we must have imitated you must have imitated they must have imitated
V-ing perfect
I must have been imitating you must have been imitating he must have been imitating we must have been imitating you must have been imitating they must have been imitating
Negation
Simple form
I mustn't imitate you mustn't imitate he mustn't imitate we mustn't imitate you mustn't imitate they mustn't imitate
V-ing form
I mustn't be imitating you mustn't be imitating he mustn't be imitating we mustn't be imitating you mustn't be imitating they mustn't be imitating
Perfect
I mustn't have imitated you mustn't have imitated he mustn't have imitated we mustn't have imitated you mustn't have imitated they mustn't have imitated
V-ing perfect
I mustn't have been imitating you mustn't have been imitating he mustn't have been imitating we mustn't have been imitating you mustn't have been imitating they mustn't have been imitating
Interrogative form
Simple form
must I imitate? must you imitate? must he imitate? must we imitate? must you imitate? must they imitate?
V-ing form
must I be imitating? must you be imitating? must he be imitating? must we be imitating? must you be imitating? must they be imitating?
Perfect
must I have imitated? must you have imitated? must he have imitated? must we have imitated? must you have imitated? must they have imitated?
V-ing perfect
must I have been imitating? must you have been imitating? must he have been imitating? must we have been imitating? must you have been imitating? must they have been imitating?
Interro-negative form
Simple form
mustn't I imitate? mustn't you imitate? mustn't he imitate? mustn't we imitate? mustn't you imitate? mustn't they imitate?
V-ing form
mustn't I be imitating? mustn't you be imitating? mustn't he be imitating? mustn't we be imitating? mustn't you be imitating? mustn't they be imitating?
Perfect
mustn't I have imitated? mustn't you have imitated? mustn't he have imitated? mustn't we have imitated? mustn't you have imitated? mustn't they have imitated?
V-ing perfect
mustn't I have been imitating? mustn't you have been imitating? mustn't he have been imitating? mustn't we have been imitating? mustn't you have been imitating? mustn't they have been imitating?