English verb conjugation
MUST INVOLVE

Regular verb: involve - involved - involved

Affirmation

Simple form	V-ing form
I must involve you must involve she must involve we must involve you must involve they must involve	I must be involving you must be involving she must be involving we must be involving you must be involving they must be involving
Perfect	V-ing perfect
I must have involved you must have involved she must have involved we must have involved you must have involved they must have involved	I must have been involving you must have been involving she must have been involving we must have been involving you must have been involving they must have been involving

Negation

Simple form	V-ing form
I mustn't involve you mustn't involve she mustn't involve we mustn't involve you mustn't involve they mustn't involve	I mustn't be involving you mustn't be involving she mustn't be involving we mustn't be involving you mustn't be involving they mustn't be involving
Perfect	V-ing perfect
I mustn't have involved you mustn't have involved she mustn't have involved we mustn't have involved you mustn't have involved they mustn't have involved	I mustn't have been involving you mustn't have been involving she mustn't have been involving we mustn't have been involving you mustn't have been involving they mustn't have been involving

Interrogative form

Simple form	V-ing form
must I involve? must you involve? must she involve? must we involve? must you involve? must they involve?	must I be involving? must you be involving? must she be involving? must we be involving? must you be involving? must they be involving?
Perfect	V-ing perfect
must I have involved? must you have involved? must she have involved? must we have involved? must you have involved? must they have involved?	must I have been involving? must you have been involving? must she have been involving? must we have been involving? must you have been involving? must they have been involving?

Interro-negative form

Simple form	V-ing form
mustn't I involve? mustn't you involve? mustn't she involve? mustn't we involve? mustn't you involve? mustn't they involve?	mustn't I be involving? mustn't you be involving? mustn't she be involving? mustn't we be involving? mustn't you be involving? mustn't they be involving?
Perfect	V-ing perfect
mustn't I have involved? mustn't you have involved? mustn't she have involved? mustn't we have involved? mustn't you have involved? mustn't they have involved?	mustn't I have been involving? mustn't you have been involving? mustn't she have been involving? mustn't we have been involving? mustn't you have been involving? mustn't they have been involving?