English verb conjugation
MUST UNBUILD

Irregular verb: unbuild - unbuilt - unbuilt

Affirmation

Simple form	V-ing form
I must unbuild you must unbuild he must unbuild we must unbuild you must unbuild they must unbuild	I must be unbuilding you must be unbuilding he must be unbuilding we must be unbuilding you must be unbuilding they must be unbuilding
Perfect	V-ing perfect
I must have unbuilt you must have unbuilt he must have unbuilt we must have unbuilt you must have unbuilt they must have unbuilt	I must have been unbuilding you must have been unbuilding he must have been unbuilding we must have been unbuilding you must have been unbuilding they must have been unbuilding

Negation

Simple form	V-ing form
I mustn't unbuild you mustn't unbuild he mustn't unbuild we mustn't unbuild you mustn't unbuild they mustn't unbuild	I mustn't be unbuilding you mustn't be unbuilding he mustn't be unbuilding we mustn't be unbuilding you mustn't be unbuilding they mustn't be unbuilding
Perfect	V-ing perfect
I mustn't have unbuilt you mustn't have unbuilt he mustn't have unbuilt we mustn't have unbuilt you mustn't have unbuilt they mustn't have unbuilt	I mustn't have been unbuilding you mustn't have been unbuilding he mustn't have been unbuilding we mustn't have been unbuilding you mustn't have been unbuilding they mustn't have been unbuilding

Interrogative form

Simple form	V-ing form
must I unbuild? must you unbuild? must he unbuild? must we unbuild? must you unbuild? must they unbuild?	must I be unbuilding? must you be unbuilding? must he be unbuilding? must we be unbuilding? must you be unbuilding? must they be unbuilding?
Perfect	V-ing perfect
must I have unbuilt? must you have unbuilt? must he have unbuilt? must we have unbuilt? must you have unbuilt? must they have unbuilt?	must I have been unbuilding? must you have been unbuilding? must he have been unbuilding? must we have been unbuilding? must you have been unbuilding? must they have been unbuilding?

Interro-negative form

Simple form	V-ing form
mustn't I unbuild? mustn't you unbuild? mustn't he unbuild? mustn't we unbuild? mustn't you unbuild? mustn't they unbuild?	mustn't I be unbuilding? mustn't you be unbuilding? mustn't he be unbuilding? mustn't we be unbuilding? mustn't you be unbuilding? mustn't they be unbuilding?
Perfect	V-ing perfect
mustn't I have unbuilt? mustn't you have unbuilt? mustn't he have unbuilt? mustn't we have unbuilt? mustn't you have unbuilt? mustn't they have unbuilt?	mustn't I have been unbuilding? mustn't you have been unbuilding? mustn't he have been unbuilding? mustn't we have been unbuilding? mustn't you have been unbuilding? mustn't they have been unbuilding?