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 mustn't iris you mustn't iris she mustn't iris we mustn't iris you mustn't iris they mustn't iris	I mustn't be irising you mustn't be irising she mustn't be irising we mustn't be irising you mustn't be irising they mustn't be irising
Perfect	V-ing perfect
I mustn't have irised you mustn't have irised she mustn't have irised we mustn't have irised you mustn't have irised they mustn't have irised	I mustn't have been irising you mustn't have been irising she mustn't have been irising we mustn't have been irising you mustn't have been irising they mustn't 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
mustn't I iris? mustn't you iris? mustn't she iris? mustn't we iris? mustn't you iris? mustn't they iris?	mustn't I be irising? mustn't you be irising? mustn't she be irising? mustn't we be irising? mustn't you be irising? mustn't they be irising?
Perfect	V-ing perfect
mustn't I have irised? mustn't you have irised? mustn't she have irised? mustn't we have irised? mustn't you have irised? mustn't they have irised?	mustn't I have been irising? mustn't you have been irising? mustn't she have been irising? mustn't we have been irising? mustn't you have been irising? mustn't they have been irising?