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