English verb conjugation
MUST SULK

Regular verb: sulk - sulked - sulked

Affirmation

Simple form	V-ing form
I must sulk you must sulk he must sulk we must sulk you must sulk they must sulk	I must be sulking you must be sulking he must be sulking we must be sulking you must be sulking they must be sulking
Perfect	V-ing perfect
I must have sulked you must have sulked he must have sulked we must have sulked you must have sulked they must have sulked	I must have been sulking you must have been sulking he must have been sulking we must have been sulking you must have been sulking they must have been sulking

Negation

Simple form	V-ing form
I must not sulk you must not sulk he must not sulk we must not sulk you must not sulk they must not sulk	I must not be sulking you must not be sulking he must not be sulking we must not be sulking you must not be sulking they must not be sulking
Perfect	V-ing perfect
I must not have sulked you must not have sulked he must not have sulked we must not have sulked you must not have sulked they must not have sulked	I must not have been sulking you must not have been sulking he must not have been sulking we must not have been sulking you must not have been sulking they must not have been sulking

Interrogative form

Simple form	V-ing form
must I sulk? must you sulk? must he sulk? must we sulk? must you sulk? must they sulk?	must I be sulking? must you be sulking? must he be sulking? must we be sulking? must you be sulking? must they be sulking?
Perfect	V-ing perfect
must I have sulked? must you have sulked? must he have sulked? must we have sulked? must you have sulked? must they have sulked?	must I have been sulking? must you have been sulking? must he have been sulking? must we have been sulking? must you have been sulking? must they have been sulking?

Interro-negative form

Simple form	V-ing form
must I not sulk? must you not sulk? must he not sulk? must we not sulk? must you not sulk? must they not sulk?	must I not be sulking? must you not be sulking? must he not be sulking? must we not be sulking? must you not be sulking? must they not be sulking?
Perfect	V-ing perfect
must I not have sulked? must you not have sulked? must he not have sulked? must we not have sulked? must you not have sulked? must they not have sulked?	must I not have been sulking? must you not have been sulking? must he not have been sulking? must we not have been sulking? must you not have been sulking? must they not have been sulking?