English verb conjugation
MUST UPGRADE

Regular verb: upgrade - upgraded - upgraded

Affirmation

Simple form	V-ing form
I must upgrade you must upgrade he must upgrade we must upgrade you must upgrade they must upgrade	I must be upgrading you must be upgrading he must be upgrading we must be upgrading you must be upgrading they must be upgrading
Perfect	V-ing perfect
I must have upgraded you must have upgraded he must have upgraded we must have upgraded you must have upgraded they must have upgraded	I must have been upgrading you must have been upgrading he must have been upgrading we must have been upgrading you must have been upgrading they must have been upgrading

Negation

Simple form	V-ing form
I mustn't upgrade you mustn't upgrade he mustn't upgrade we mustn't upgrade you mustn't upgrade they mustn't upgrade	I mustn't be upgrading you mustn't be upgrading he mustn't be upgrading we mustn't be upgrading you mustn't be upgrading they mustn't be upgrading
Perfect	V-ing perfect
I mustn't have upgraded you mustn't have upgraded he mustn't have upgraded we mustn't have upgraded you mustn't have upgraded they mustn't have upgraded	I mustn't have been upgrading you mustn't have been upgrading he mustn't have been upgrading we mustn't have been upgrading you mustn't have been upgrading they mustn't have been upgrading

Interrogative form

Simple form	V-ing form
must I upgrade? must you upgrade? must he upgrade? must we upgrade? must you upgrade? must they upgrade?	must I be upgrading? must you be upgrading? must he be upgrading? must we be upgrading? must you be upgrading? must they be upgrading?
Perfect	V-ing perfect
must I have upgraded? must you have upgraded? must he have upgraded? must we have upgraded? must you have upgraded? must they have upgraded?	must I have been upgrading? must you have been upgrading? must he have been upgrading? must we have been upgrading? must you have been upgrading? must they have been upgrading?

Interro-negative form

Simple form	V-ing form
mustn't I upgrade? mustn't you upgrade? mustn't he upgrade? mustn't we upgrade? mustn't you upgrade? mustn't they upgrade?	mustn't I be upgrading? mustn't you be upgrading? mustn't he be upgrading? mustn't we be upgrading? mustn't you be upgrading? mustn't they be upgrading?
Perfect	V-ing perfect
mustn't I have upgraded? mustn't you have upgraded? mustn't he have upgraded? mustn't we have upgraded? mustn't you have upgraded? mustn't they have upgraded?	mustn't I have been upgrading? mustn't you have been upgrading? mustn't he have been upgrading? mustn't we have been upgrading? mustn't you have been upgrading? mustn't they have been upgrading?