I must disillusion you must disillusion she must disillusion we must disillusion you must disillusion they must disillusion
V-ing form
I must be disillusioning you must be disillusioning she must be disillusioning we must be disillusioning you must be disillusioning they must be disillusioning
Perfect
I must have disillusioned you must have disillusioned she 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 she 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 she 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 she 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 she 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 she 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 she disillusion? must we disillusion? must you disillusion? must they disillusion?
V-ing form
must I be disillusioning? must you be disillusioning? must she be disillusioning? must we be disillusioning? must you be disillusioning? must they be disillusioning?
Perfect
must I have disillusioned? must you have disillusioned? must she 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 she 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 she 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 she 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 she 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 she have been disillusioning? mustn't we have been disillusioning? mustn't you have been disillusioning? mustn't they have been disillusioning?