English verb conjugation
MUST IRIS

Regular verb: iris - irised - irised

Affirmation

Simple form	V-ing form
I must iris you must iris she must iris we must iris you must iris they must iris	I must be irising you must be irising she must be irising we must be irising you must be irising they must be irising
Perfect	V-ing perfect
I must have irised you must have irised she must have irised we must have irised you must have irised they must have irised	I must have been irising you must have been irising she must have been irising we must have been irising you must have been irising they must have been irising

Negation

Simple form	V-ing form
I must not iris you must not iris she must not iris we must not iris you must not iris they must not iris	I must not be irising you must not be irising she must not be irising we must not be irising you must not be irising they must not be irising
Perfect	V-ing perfect
I must not have irised you must not have irised she must not have irised we must not have irised you must not have irised they must not have irised	I must not have been irising you must not have been irising she must not have been irising we must not have been irising you must not have been irising they must not have been irising

Interrogative form

Simple form	V-ing form
must I iris? must you iris? must she iris? must we iris? must you iris? must they iris?	must I be irising? must you be irising? must she be irising? must we be irising? must you be irising? must they be irising?
Perfect	V-ing perfect
must I have irised? must you have irised? must she have irised? must we have irised? must you have irised? must they have irised?	must I have been irising? must you have been irising? must she have been irising? must we have been irising? must you have been irising? must they have been irising?

Interro-negative form

Simple form	V-ing form
must I not iris? must you not iris? must she not iris? must we not iris? must you not iris? must they not iris?	must I not be irising? must you not be irising? must she not be irising? must we not be irising? must you not be irising? must they not be irising?
Perfect	V-ing perfect
must I not have irised? must you not have irised? must she not have irised? must we not have irised? must you not have irised? must they not have irised?	must I not have been irising? must you not have been irising? must she not have been irising? must we not have been irising? must you not have been irising? must they not have been irising?