English verb conjugation
MUST CLEAN

Regular verb: clean - cleaned - cleaned

Affirmation

Simple form	V-ing form
I must clean you must clean he must clean we must clean you must clean they must clean	I must be cleaning you must be cleaning he must be cleaning we must be cleaning you must be cleaning they must be cleaning
Perfect	V-ing perfect
I must have cleaned you must have cleaned he must have cleaned we must have cleaned you must have cleaned they must have cleaned	I must have been cleaning you must have been cleaning he must have been cleaning we must have been cleaning you must have been cleaning they must have been cleaning

Negation

Simple form	V-ing form
I mustn't clean you mustn't clean he mustn't clean we mustn't clean you mustn't clean they mustn't clean	I mustn't be cleaning you mustn't be cleaning he mustn't be cleaning we mustn't be cleaning you mustn't be cleaning they mustn't be cleaning
Perfect	V-ing perfect
I mustn't have cleaned you mustn't have cleaned he mustn't have cleaned we mustn't have cleaned you mustn't have cleaned they mustn't have cleaned	I mustn't have been cleaning you mustn't have been cleaning he mustn't have been cleaning we mustn't have been cleaning you mustn't have been cleaning they mustn't have been cleaning

Interrogative form

Simple form	V-ing form
must I clean? must you clean? must he clean? must we clean? must you clean? must they clean?	must I be cleaning? must you be cleaning? must he be cleaning? must we be cleaning? must you be cleaning? must they be cleaning?
Perfect	V-ing perfect
must I have cleaned? must you have cleaned? must he have cleaned? must we have cleaned? must you have cleaned? must they have cleaned?	must I have been cleaning? must you have been cleaning? must he have been cleaning? must we have been cleaning? must you have been cleaning? must they have been cleaning?

Interro-negative form

Simple form	V-ing form
mustn't I clean? mustn't you clean? mustn't he clean? mustn't we clean? mustn't you clean? mustn't they clean?	mustn't I be cleaning? mustn't you be cleaning? mustn't he be cleaning? mustn't we be cleaning? mustn't you be cleaning? mustn't they be cleaning?
Perfect	V-ing perfect
mustn't I have cleaned? mustn't you have cleaned? mustn't he have cleaned? mustn't we have cleaned? mustn't you have cleaned? mustn't they have cleaned?	mustn't I have been cleaning? mustn't you have been cleaning? mustn't he have been cleaning? mustn't we have been cleaning? mustn't you have been cleaning? mustn't they have been cleaning?