English verb conjugation
MUST BEFOUL

Regular verb: befoul - befouled - befouled

Affirmation

Simple form	V-ing form
I must befoul you must befoul he must befoul we must befoul you must befoul they must befoul	I must be befouling you must be befouling he must be befouling we must be befouling you must be befouling they must be befouling
Perfect	V-ing perfect
I must have befouled you must have befouled he must have befouled we must have befouled you must have befouled they must have befouled	I must have been befouling you must have been befouling he must have been befouling we must have been befouling you must have been befouling they must have been befouling

Negation

Simple form	V-ing form
I mustn't befoul you mustn't befoul he mustn't befoul we mustn't befoul you mustn't befoul they mustn't befoul	I mustn't be befouling you mustn't be befouling he mustn't be befouling we mustn't be befouling you mustn't be befouling they mustn't be befouling
Perfect	V-ing perfect
I mustn't have befouled you mustn't have befouled he mustn't have befouled we mustn't have befouled you mustn't have befouled they mustn't have befouled	I mustn't have been befouling you mustn't have been befouling he mustn't have been befouling we mustn't have been befouling you mustn't have been befouling they mustn't have been befouling

Interrogative form

Simple form	V-ing form
must I befoul? must you befoul? must he befoul? must we befoul? must you befoul? must they befoul?	must I be befouling? must you be befouling? must he be befouling? must we be befouling? must you be befouling? must they be befouling?
Perfect	V-ing perfect
must I have befouled? must you have befouled? must he have befouled? must we have befouled? must you have befouled? must they have befouled?	must I have been befouling? must you have been befouling? must he have been befouling? must we have been befouling? must you have been befouling? must they have been befouling?

Interro-negative form

Simple form	V-ing form
mustn't I befoul? mustn't you befoul? mustn't he befoul? mustn't we befoul? mustn't you befoul? mustn't they befoul?	mustn't I be befouling? mustn't you be befouling? mustn't he be befouling? mustn't we be befouling? mustn't you be befouling? mustn't they be befouling?
Perfect	V-ing perfect
mustn't I have befouled? mustn't you have befouled? mustn't he have befouled? mustn't we have befouled? mustn't you have befouled? mustn't they have befouled?	mustn't I have been befouling? mustn't you have been befouling? mustn't he have been befouling? mustn't we have been befouling? mustn't you have been befouling? mustn't they have been befouling?