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 must not clean you must not clean he must not clean we must not clean you must not clean they must not clean	I must not be cleaning you must not be cleaning he must not be cleaning we must not be cleaning you must not be cleaning they must not be cleaning
Perfect	V-ing perfect
I must not have cleaned you must not have cleaned he must not have cleaned we must not have cleaned you must not have cleaned they must not have cleaned	I must not have been cleaning you must not have been cleaning he must not have been cleaning we must not have been cleaning you must not have been cleaning they must not 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
must I not clean? must you not clean? must he not clean? must we not clean? must you not clean? must they not clean?	must I not be cleaning? must you not be cleaning? must he not be cleaning? must we not be cleaning? must you not be cleaning? must they not be cleaning?
Perfect	V-ing perfect
must I not have cleaned? must you not have cleaned? must he not have cleaned? must we not have cleaned? must you not have cleaned? must they not have cleaned?	must I not have been cleaning? must you not have been cleaning? must he not have been cleaning? must we not have been cleaning? must you not have been cleaning? must they not have been cleaning?