English verb conjugation
MUST ZIP

Regular verb: zip - zipped - zipped

Affirmation

Simple form	V-ing form
I must zip you must zip she must zip we must zip you must zip they must zip	I must be zipping you must be zipping she 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 she 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 she 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 she 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 she 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 she 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 she 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 she zip? must we zip? must you zip? must they zip?	must I be zipping? must you be zipping? must she 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 she 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 she 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 she 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 she 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 she 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 she have been zipping? mustn't we have been zipping? mustn't you have been zipping? mustn't they have been zipping?