English verb conjugation
COULD UNBUILD

Irregular verb: unbuild - unbuilt - unbuilt

Affirmation

Simple form	V-ing form
I could unbuild you could unbuild she could unbuild we could unbuild you could unbuild they could unbuild	I could be unbuilding you could be unbuilding she 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 she 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 she 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 she 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 she 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 she 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 she 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 she unbuild? could we unbuild? could you unbuild? could they unbuild?	could I be unbuilding? could you be unbuilding? could she 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 she 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 she 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 she 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 she 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 she 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 she have been unbuilding? couldn't we have been unbuilding? couldn't you have been unbuilding? couldn't they have been unbuilding?