English verb conjugation
MUST ZIP

Regular verb: zip - zipped - zipped

Affirmation

Simple form	V-ing form
I must zip you must zip he must zip we must zip you must zip they must zip	I must be zipping you must be zipping he must be zipping we must be zipping you must be zipping they must be zipping
Perfect	V-ing perfect
I must have zipped you must have zipped he must have zipped we must have zipped you must have zipped they must have zipped	I must have been zipping you must have been zipping he must have been zipping we must have been zipping you must have been zipping they must have been zipping

Negation

Simple form	V-ing form
I mustn't zip you mustn't zip he mustn't zip we mustn't zip you mustn't zip they mustn't zip	I mustn't be zipping you mustn't be zipping he mustn't be zipping we mustn't be zipping you mustn't be zipping they mustn't be zipping
Perfect	V-ing perfect
I mustn't have zipped you mustn't have zipped he mustn't have zipped we mustn't have zipped you mustn't have zipped they mustn't have zipped	I mustn't have been zipping you mustn't have been zipping he mustn't have been zipping we mustn't have been zipping you mustn't have been zipping they mustn't have been zipping

Interrogative form

Simple form	V-ing form
must I zip? must you zip? must he zip? must we zip? must you zip? must they zip?	must I be zipping? must you be zipping? must he be zipping? must we be zipping? must you be zipping? must they be zipping?
Perfect	V-ing perfect
must I have zipped? must you have zipped? must he have zipped? must we have zipped? must you have zipped? must they have zipped?	must I have been zipping? must you have been zipping? must he have been zipping? must we have been zipping? must you have been zipping? must they have been zipping?

Interro-negative form

Simple form	V-ing form
mustn't I zip? mustn't you zip? mustn't he zip? mustn't we zip? mustn't you zip? mustn't they zip?	mustn't I be zipping? mustn't you be zipping? mustn't he be zipping? mustn't we be zipping? mustn't you be zipping? mustn't they be zipping?
Perfect	V-ing perfect
mustn't I have zipped? mustn't you have zipped? mustn't he have zipped? mustn't we have zipped? mustn't you have zipped? mustn't they have zipped?	mustn't I have been zipping? mustn't you have been zipping? mustn't he have been zipping? mustn't we have been zipping? mustn't you have been zipping? mustn't they have been zipping?