English verb conjugation
COULD UNBUILD

Irregular verb: unbuild - unbuilt - unbuilt

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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