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