English verb conjugation
MUST STOOL

Regular verb: stool - stooled - stooled

Affirmation

Simple form	V-ing form
I must stool you must stool he must stool we must stool you must stool they must stool	I must be stooling you must be stooling he must be stooling we must be stooling you must be stooling they must be stooling
Perfect	V-ing perfect
I must have stooled you must have stooled he must have stooled we must have stooled you must have stooled they must have stooled	I must have been stooling you must have been stooling he must have been stooling we must have been stooling you must have been stooling they must have been stooling

Negation

Simple form	V-ing form
I mustn't stool you mustn't stool he mustn't stool we mustn't stool you mustn't stool they mustn't stool	I mustn't be stooling you mustn't be stooling he mustn't be stooling we mustn't be stooling you mustn't be stooling they mustn't be stooling
Perfect	V-ing perfect
I mustn't have stooled you mustn't have stooled he mustn't have stooled we mustn't have stooled you mustn't have stooled they mustn't have stooled	I mustn't have been stooling you mustn't have been stooling he mustn't have been stooling we mustn't have been stooling you mustn't have been stooling they mustn't have been stooling

Interrogative form

Simple form	V-ing form
must I stool? must you stool? must he stool? must we stool? must you stool? must they stool?	must I be stooling? must you be stooling? must he be stooling? must we be stooling? must you be stooling? must they be stooling?
Perfect	V-ing perfect
must I have stooled? must you have stooled? must he have stooled? must we have stooled? must you have stooled? must they have stooled?	must I have been stooling? must you have been stooling? must he have been stooling? must we have been stooling? must you have been stooling? must they have been stooling?

Interro-negative form

Simple form	V-ing form
mustn't I stool? mustn't you stool? mustn't he stool? mustn't we stool? mustn't you stool? mustn't they stool?	mustn't I be stooling? mustn't you be stooling? mustn't he be stooling? mustn't we be stooling? mustn't you be stooling? mustn't they be stooling?
Perfect	V-ing perfect
mustn't I have stooled? mustn't you have stooled? mustn't he have stooled? mustn't we have stooled? mustn't you have stooled? mustn't they have stooled?	mustn't I have been stooling? mustn't you have been stooling? mustn't he have been stooling? mustn't we have been stooling? mustn't you have been stooling? mustn't they have been stooling?