English verb conjugation
COULD UNSHIFT

Regular verb: unshift - unshifted - unshifted

Affirmation

Simple form	V-ing form
I could unshift you could unshift she could unshift we could unshift you could unshift they could unshift	I could be unshifting you could be unshifting she could be unshifting we could be unshifting you could be unshifting they could be unshifting
Perfect	V-ing perfect
I could have unshifted you could have unshifted she could have unshifted we could have unshifted you could have unshifted they could have unshifted	I could have been unshifting you could have been unshifting she could have been unshifting we could have been unshifting you could have been unshifting they could have been unshifting

Negation

Simple form	V-ing form
I couldn't unshift you couldn't unshift she couldn't unshift we couldn't unshift you couldn't unshift they couldn't unshift	I couldn't be unshifting you couldn't be unshifting she couldn't be unshifting we couldn't be unshifting you couldn't be unshifting they couldn't be unshifting
Perfect	V-ing perfect
I couldn't have unshifted you couldn't have unshifted she couldn't have unshifted we couldn't have unshifted you couldn't have unshifted they couldn't have unshifted	I couldn't have been unshifting you couldn't have been unshifting she couldn't have been unshifting we couldn't have been unshifting you couldn't have been unshifting they couldn't have been unshifting

Interrogative form

Simple form	V-ing form
could I unshift? could you unshift? could she unshift? could we unshift? could you unshift? could they unshift?	could I be unshifting? could you be unshifting? could she be unshifting? could we be unshifting? could you be unshifting? could they be unshifting?
Perfect	V-ing perfect
could I have unshifted? could you have unshifted? could she have unshifted? could we have unshifted? could you have unshifted? could they have unshifted?	could I have been unshifting? could you have been unshifting? could she have been unshifting? could we have been unshifting? could you have been unshifting? could they have been unshifting?

Interro-negative form

Simple form	V-ing form
couldn't I unshift? couldn't you unshift? couldn't she unshift? couldn't we unshift? couldn't you unshift? couldn't they unshift?	couldn't I be unshifting? couldn't you be unshifting? couldn't she be unshifting? couldn't we be unshifting? couldn't you be unshifting? couldn't they be unshifting?
Perfect	V-ing perfect
couldn't I have unshifted? couldn't you have unshifted? couldn't she have unshifted? couldn't we have unshifted? couldn't you have unshifted? couldn't they have unshifted?	couldn't I have been unshifting? couldn't you have been unshifting? couldn't she have been unshifting? couldn't we have been unshifting? couldn't you have been unshifting? couldn't they have been unshifting?