English verb conjugation
MUST FERULE

Regular verb: ferule - feruled - feruled

Affirmation

Simple form	V-ing form
I must ferule you must ferule he must ferule we must ferule you must ferule they must ferule	I must be feruling you must be feruling he must be feruling we must be feruling you must be feruling they must be feruling
Perfect	V-ing perfect
I must have feruled you must have feruled he must have feruled we must have feruled you must have feruled they must have feruled	I must have been feruling you must have been feruling he must have been feruling we must have been feruling you must have been feruling they must have been feruling

Negation

Simple form	V-ing form
I mustn't ferule you mustn't ferule he mustn't ferule we mustn't ferule you mustn't ferule they mustn't ferule	I mustn't be feruling you mustn't be feruling he mustn't be feruling we mustn't be feruling you mustn't be feruling they mustn't be feruling
Perfect	V-ing perfect
I mustn't have feruled you mustn't have feruled he mustn't have feruled we mustn't have feruled you mustn't have feruled they mustn't have feruled	I mustn't have been feruling you mustn't have been feruling he mustn't have been feruling we mustn't have been feruling you mustn't have been feruling they mustn't have been feruling

Interrogative form

Simple form	V-ing form
must I ferule? must you ferule? must he ferule? must we ferule? must you ferule? must they ferule?	must I be feruling? must you be feruling? must he be feruling? must we be feruling? must you be feruling? must they be feruling?
Perfect	V-ing perfect
must I have feruled? must you have feruled? must he have feruled? must we have feruled? must you have feruled? must they have feruled?	must I have been feruling? must you have been feruling? must he have been feruling? must we have been feruling? must you have been feruling? must they have been feruling?

Interro-negative form

Simple form	V-ing form
mustn't I ferule? mustn't you ferule? mustn't he ferule? mustn't we ferule? mustn't you ferule? mustn't they ferule?	mustn't I be feruling? mustn't you be feruling? mustn't he be feruling? mustn't we be feruling? mustn't you be feruling? mustn't they be feruling?
Perfect	V-ing perfect
mustn't I have feruled? mustn't you have feruled? mustn't he have feruled? mustn't we have feruled? mustn't you have feruled? mustn't they have feruled?	mustn't I have been feruling? mustn't you have been feruling? mustn't he have been feruling? mustn't we have been feruling? mustn't you have been feruling? mustn't they have been feruling?