English verb conjugation
MUST AGREE

Regular verb: agree - agreed - agreed

Affirmation

Simple form	V-ing form
I must agree you must agree he must agree we must agree you must agree they must agree	I must be agreeing you must be agreeing he must be agreeing we must be agreeing you must be agreeing they must be agreeing
Perfect	V-ing perfect
I must have agreed you must have agreed he must have agreed we must have agreed you must have agreed they must have agreed	I must have been agreeing you must have been agreeing he must have been agreeing we must have been agreeing you must have been agreeing they must have been agreeing

Negation

Simple form	V-ing form
I mustn't agree you mustn't agree he mustn't agree we mustn't agree you mustn't agree they mustn't agree	I mustn't be agreeing you mustn't be agreeing he mustn't be agreeing we mustn't be agreeing you mustn't be agreeing they mustn't be agreeing
Perfect	V-ing perfect
I mustn't have agreed you mustn't have agreed he mustn't have agreed we mustn't have agreed you mustn't have agreed they mustn't have agreed	I mustn't have been agreeing you mustn't have been agreeing he mustn't have been agreeing we mustn't have been agreeing you mustn't have been agreeing they mustn't have been agreeing

Interrogative form

Simple form	V-ing form
must I agree? must you agree? must he agree? must we agree? must you agree? must they agree?	must I be agreeing? must you be agreeing? must he be agreeing? must we be agreeing? must you be agreeing? must they be agreeing?
Perfect	V-ing perfect
must I have agreed? must you have agreed? must he have agreed? must we have agreed? must you have agreed? must they have agreed?	must I have been agreeing? must you have been agreeing? must he have been agreeing? must we have been agreeing? must you have been agreeing? must they have been agreeing?

Interro-negative form

Simple form	V-ing form
mustn't I agree? mustn't you agree? mustn't he agree? mustn't we agree? mustn't you agree? mustn't they agree?	mustn't I be agreeing? mustn't you be agreeing? mustn't he be agreeing? mustn't we be agreeing? mustn't you be agreeing? mustn't they be agreeing?
Perfect	V-ing perfect
mustn't I have agreed? mustn't you have agreed? mustn't he have agreed? mustn't we have agreed? mustn't you have agreed? mustn't they have agreed?	mustn't I have been agreeing? mustn't you have been agreeing? mustn't he have been agreeing? mustn't we have been agreeing? mustn't you have been agreeing? mustn't they have been agreeing?