English verb conjugation
MUST INVOLVE

Regular verb: involve - involved - involved

Affirmation

Simple form	V-ing form
I must involve you must involve he must involve we must involve you must involve they must involve	I must be involving you must be involving he 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 he 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 he 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 he 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 he 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 he 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 he 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 he involve? must we involve? must you involve? must they involve?	must I be involving? must you be involving? must he 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 he 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 he 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 he 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 he 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 he 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 he have been involving? mustn't we have been involving? mustn't you have been involving? mustn't they have been involving?