English verb conjugation
MUST ZIPPER

Regular verb: zipper - zippered - zippered

Affirmation

Simple form	V-ing form
I must zipper you must zipper he must zipper we must zipper you must zipper they must zipper	I must be zippering you must be zippering he must be zippering we must be zippering you must be zippering they must be zippering
Perfect	V-ing perfect
I must have zippered you must have zippered he must have zippered we must have zippered you must have zippered they must have zippered	I must have been zippering you must have been zippering he must have been zippering we must have been zippering you must have been zippering they must have been zippering

Negation

Simple form	V-ing form
I mustn't zipper you mustn't zipper he mustn't zipper we mustn't zipper you mustn't zipper they mustn't zipper	I mustn't be zippering you mustn't be zippering he mustn't be zippering we mustn't be zippering you mustn't be zippering they mustn't be zippering
Perfect	V-ing perfect
I mustn't have zippered you mustn't have zippered he mustn't have zippered we mustn't have zippered you mustn't have zippered they mustn't have zippered	I mustn't have been zippering you mustn't have been zippering he mustn't have been zippering we mustn't have been zippering you mustn't have been zippering they mustn't have been zippering

Interrogative form

Simple form	V-ing form
must I zipper? must you zipper? must he zipper? must we zipper? must you zipper? must they zipper?	must I be zippering? must you be zippering? must he be zippering? must we be zippering? must you be zippering? must they be zippering?
Perfect	V-ing perfect
must I have zippered? must you have zippered? must he have zippered? must we have zippered? must you have zippered? must they have zippered?	must I have been zippering? must you have been zippering? must he have been zippering? must we have been zippering? must you have been zippering? must they have been zippering?

Interro-negative form

Simple form	V-ing form
mustn't I zipper? mustn't you zipper? mustn't he zipper? mustn't we zipper? mustn't you zipper? mustn't they zipper?	mustn't I be zippering? mustn't you be zippering? mustn't he be zippering? mustn't we be zippering? mustn't you be zippering? mustn't they be zippering?
Perfect	V-ing perfect
mustn't I have zippered? mustn't you have zippered? mustn't he have zippered? mustn't we have zippered? mustn't you have zippered? mustn't they have zippered?	mustn't I have been zippering? mustn't you have been zippering? mustn't he have been zippering? mustn't we have been zippering? mustn't you have been zippering? mustn't they have been zippering?