English verb conjugation
COULD UNSTRING

Irregular verb: unstring - unstrung - unstrung

Affirmation

Simple form	V-ing form
I could unstring you could unstring she could unstring we could unstring you could unstring they could unstring	I could be unstringing you could be unstringing she could be unstringing we could be unstringing you could be unstringing they could be unstringing
Perfect	V-ing perfect
I could have unstrung you could have unstrung she could have unstrung we could have unstrung you could have unstrung they could have unstrung	I could have been unstringing you could have been unstringing she could have been unstringing we could have been unstringing you could have been unstringing they could have been unstringing

Negation

Simple form	V-ing form
I couldn't unstring you couldn't unstring she couldn't unstring we couldn't unstring you couldn't unstring they couldn't unstring	I couldn't be unstringing you couldn't be unstringing she couldn't be unstringing we couldn't be unstringing you couldn't be unstringing they couldn't be unstringing
Perfect	V-ing perfect
I couldn't have unstrung you couldn't have unstrung she couldn't have unstrung we couldn't have unstrung you couldn't have unstrung they couldn't have unstrung	I couldn't have been unstringing you couldn't have been unstringing she couldn't have been unstringing we couldn't have been unstringing you couldn't have been unstringing they couldn't have been unstringing

Interrogative form

Simple form	V-ing form
could I unstring? could you unstring? could she unstring? could we unstring? could you unstring? could they unstring?	could I be unstringing? could you be unstringing? could she be unstringing? could we be unstringing? could you be unstringing? could they be unstringing?
Perfect	V-ing perfect
could I have unstrung? could you have unstrung? could she have unstrung? could we have unstrung? could you have unstrung? could they have unstrung?	could I have been unstringing? could you have been unstringing? could she have been unstringing? could we have been unstringing? could you have been unstringing? could they have been unstringing?

Interro-negative form

Simple form	V-ing form
couldn't I unstring? couldn't you unstring? couldn't she unstring? couldn't we unstring? couldn't you unstring? couldn't they unstring?	couldn't I be unstringing? couldn't you be unstringing? couldn't she be unstringing? couldn't we be unstringing? couldn't you be unstringing? couldn't they be unstringing?
Perfect	V-ing perfect
couldn't I have unstrung? couldn't you have unstrung? couldn't she have unstrung? couldn't we have unstrung? couldn't you have unstrung? couldn't they have unstrung?	couldn't I have been unstringing? couldn't you have been unstringing? couldn't she have been unstringing? couldn't we have been unstringing? couldn't you have been unstringing? couldn't they have been unstringing?