English verb conjugation
MUST SHIRK

Regular verb: shirk - shirked - shirked

Affirmation

Simple form	V-ing form
I must shirk you must shirk he must shirk we must shirk you must shirk they must shirk	I must be shirking you must be shirking he must be shirking we must be shirking you must be shirking they must be shirking
Perfect	V-ing perfect
I must have shirked you must have shirked he must have shirked we must have shirked you must have shirked they must have shirked	I must have been shirking you must have been shirking he must have been shirking we must have been shirking you must have been shirking they must have been shirking

Negation

Simple form	V-ing form
I must not shirk you must not shirk he must not shirk we must not shirk you must not shirk they must not shirk	I must not be shirking you must not be shirking he must not be shirking we must not be shirking you must not be shirking they must not be shirking
Perfect	V-ing perfect
I must not have shirked you must not have shirked he must not have shirked we must not have shirked you must not have shirked they must not have shirked	I must not have been shirking you must not have been shirking he must not have been shirking we must not have been shirking you must not have been shirking they must not have been shirking

Interrogative form

Simple form	V-ing form
must I shirk? must you shirk? must he shirk? must we shirk? must you shirk? must they shirk?	must I be shirking? must you be shirking? must he be shirking? must we be shirking? must you be shirking? must they be shirking?
Perfect	V-ing perfect
must I have shirked? must you have shirked? must he have shirked? must we have shirked? must you have shirked? must they have shirked?	must I have been shirking? must you have been shirking? must he have been shirking? must we have been shirking? must you have been shirking? must they have been shirking?

Interro-negative form

Simple form	V-ing form
must I not shirk? must you not shirk? must he not shirk? must we not shirk? must you not shirk? must they not shirk?	must I not be shirking? must you not be shirking? must he not be shirking? must we not be shirking? must you not be shirking? must they not be shirking?
Perfect	V-ing perfect
must I not have shirked? must you not have shirked? must he not have shirked? must we not have shirked? must you not have shirked? must they not have shirked?	must I not have been shirking? must you not have been shirking? must he not have been shirking? must we not have been shirking? must you not have been shirking? must they not have been shirking?