English verb conjugation
MUST UNSTRING

Irregular verb: unstring - unstrung - unstrung

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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