English verb conjugation
MUST LOOP

Regular verb: loop - looped - looped

Affirmation

Simple form	V-ing form
I must loop you must loop he must loop we must loop you must loop they must loop	I must be looping you must be looping he must be looping we must be looping you must be looping they must be looping
Perfect	V-ing perfect
I must have looped you must have looped he must have looped we must have looped you must have looped they must have looped	I must have been looping you must have been looping he must have been looping we must have been looping you must have been looping they must have been looping

Negation

Simple form	V-ing form
I mustn't loop you mustn't loop he mustn't loop we mustn't loop you mustn't loop they mustn't loop	I mustn't be looping you mustn't be looping he mustn't be looping we mustn't be looping you mustn't be looping they mustn't be looping
Perfect	V-ing perfect
I mustn't have looped you mustn't have looped he mustn't have looped we mustn't have looped you mustn't have looped they mustn't have looped	I mustn't have been looping you mustn't have been looping he mustn't have been looping we mustn't have been looping you mustn't have been looping they mustn't have been looping

Interrogative form

Simple form	V-ing form
must I loop? must you loop? must he loop? must we loop? must you loop? must they loop?	must I be looping? must you be looping? must he be looping? must we be looping? must you be looping? must they be looping?
Perfect	V-ing perfect
must I have looped? must you have looped? must he have looped? must we have looped? must you have looped? must they have looped?	must I have been looping? must you have been looping? must he have been looping? must we have been looping? must you have been looping? must they have been looping?

Interro-negative form

Simple form	V-ing form
mustn't I loop? mustn't you loop? mustn't he loop? mustn't we loop? mustn't you loop? mustn't they loop?	mustn't I be looping? mustn't you be looping? mustn't he be looping? mustn't we be looping? mustn't you be looping? mustn't they be looping?
Perfect	V-ing perfect
mustn't I have looped? mustn't you have looped? mustn't he have looped? mustn't we have looped? mustn't you have looped? mustn't they have looped?	mustn't I have been looping? mustn't you have been looping? mustn't he have been looping? mustn't we have been looping? mustn't you have been looping? mustn't they have been looping?