English verb conjugation
MUST REJOICE

Regular verb: rejoice - rejoiced - rejoiced

Affirmation

Simple form	V-ing form
I must rejoice you must rejoice he must rejoice we must rejoice you must rejoice they must rejoice	I must be rejoicing you must be rejoicing he must be rejoicing we must be rejoicing you must be rejoicing they must be rejoicing
Perfect	V-ing perfect
I must have rejoiced you must have rejoiced he must have rejoiced we must have rejoiced you must have rejoiced they must have rejoiced	I must have been rejoicing you must have been rejoicing he must have been rejoicing we must have been rejoicing you must have been rejoicing they must have been rejoicing

Negation

Simple form	V-ing form
I mustn't rejoice you mustn't rejoice he mustn't rejoice we mustn't rejoice you mustn't rejoice they mustn't rejoice	I mustn't be rejoicing you mustn't be rejoicing he mustn't be rejoicing we mustn't be rejoicing you mustn't be rejoicing they mustn't be rejoicing
Perfect	V-ing perfect
I mustn't have rejoiced you mustn't have rejoiced he mustn't have rejoiced we mustn't have rejoiced you mustn't have rejoiced they mustn't have rejoiced	I mustn't have been rejoicing you mustn't have been rejoicing he mustn't have been rejoicing we mustn't have been rejoicing you mustn't have been rejoicing they mustn't have been rejoicing

Interrogative form

Simple form	V-ing form
must I rejoice? must you rejoice? must he rejoice? must we rejoice? must you rejoice? must they rejoice?	must I be rejoicing? must you be rejoicing? must he be rejoicing? must we be rejoicing? must you be rejoicing? must they be rejoicing?
Perfect	V-ing perfect
must I have rejoiced? must you have rejoiced? must he have rejoiced? must we have rejoiced? must you have rejoiced? must they have rejoiced?	must I have been rejoicing? must you have been rejoicing? must he have been rejoicing? must we have been rejoicing? must you have been rejoicing? must they have been rejoicing?

Interro-negative form

Simple form	V-ing form
mustn't I rejoice? mustn't you rejoice? mustn't he rejoice? mustn't we rejoice? mustn't you rejoice? mustn't they rejoice?	mustn't I be rejoicing? mustn't you be rejoicing? mustn't he be rejoicing? mustn't we be rejoicing? mustn't you be rejoicing? mustn't they be rejoicing?
Perfect	V-ing perfect
mustn't I have rejoiced? mustn't you have rejoiced? mustn't he have rejoiced? mustn't we have rejoiced? mustn't you have rejoiced? mustn't they have rejoiced?	mustn't I have been rejoicing? mustn't you have been rejoicing? mustn't he have been rejoicing? mustn't we have been rejoicing? mustn't you have been rejoicing? mustn't they have been rejoicing?