English verb conjugation
MUST LOOP

Regular verb: loop - looped - looped

Affirmation

Simple form	V-ing form
I must loop you must loop she must loop we must loop you must loop they must loop	I must be looping you must be looping she 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 she 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 she 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 must not loop you must not loop she must not loop we must not loop you must not loop they must not loop	I must not be looping you must not be looping she must not be looping we must not be looping you must not be looping they must not be looping
Perfect	V-ing perfect
I must not have looped you must not have looped she must not have looped we must not have looped you must not have looped they must not have looped	I must not have been looping you must not have been looping she must not have been looping we must not have been looping you must not have been looping they must not have been looping

Interrogative form

Simple form	V-ing form
must I loop? must you loop? must she loop? must we loop? must you loop? must they loop?	must I be looping? must you be looping? must she 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 she 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 she 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
must I not loop? must you not loop? must she not loop? must we not loop? must you not loop? must they not loop?	must I not be looping? must you not be looping? must she not be looping? must we not be looping? must you not be looping? must they not be looping?
Perfect	V-ing perfect
must I not have looped? must you not have looped? must she not have looped? must we not have looped? must you not have looped? must they not have looped?	must I not have been looping? must you not have been looping? must she not have been looping? must we not have been looping? must you not have been looping? must they not have been looping?