English verb conjugation
MUST UNSTITCH

Regular verb: unstitch - unstitched - unstitched

Affirmation

Simple form	V-ing form
I must unstitch you must unstitch he must unstitch we must unstitch you must unstitch they must unstitch	I must be unstitching you must be unstitching he must be unstitching we must be unstitching you must be unstitching they must be unstitching
Perfect	V-ing perfect
I must have unstitched you must have unstitched he must have unstitched we must have unstitched you must have unstitched they must have unstitched	I must have been unstitching you must have been unstitching he must have been unstitching we must have been unstitching you must have been unstitching they must have been unstitching

Negation

Simple form	V-ing form
I must not unstitch you must not unstitch he must not unstitch we must not unstitch you must not unstitch they must not unstitch	I must not be unstitching you must not be unstitching he must not be unstitching we must not be unstitching you must not be unstitching they must not be unstitching
Perfect	V-ing perfect
I must not have unstitched you must not have unstitched he must not have unstitched we must not have unstitched you must not have unstitched they must not have unstitched	I must not have been unstitching you must not have been unstitching he must not have been unstitching we must not have been unstitching you must not have been unstitching they must not have been unstitching

Interrogative form

Simple form	V-ing form
must I unstitch? must you unstitch? must he unstitch? must we unstitch? must you unstitch? must they unstitch?	must I be unstitching? must you be unstitching? must he be unstitching? must we be unstitching? must you be unstitching? must they be unstitching?
Perfect	V-ing perfect
must I have unstitched? must you have unstitched? must he have unstitched? must we have unstitched? must you have unstitched? must they have unstitched?	must I have been unstitching? must you have been unstitching? must he have been unstitching? must we have been unstitching? must you have been unstitching? must they have been unstitching?

Interro-negative form

Simple form	V-ing form
must I not unstitch? must you not unstitch? must he not unstitch? must we not unstitch? must you not unstitch? must they not unstitch?	must I not be unstitching? must you not be unstitching? must he not be unstitching? must we not be unstitching? must you not be unstitching? must they not be unstitching?
Perfect	V-ing perfect
must I not have unstitched? must you not have unstitched? must he not have unstitched? must we not have unstitched? must you not have unstitched? must they not have unstitched?	must I not have been unstitching? must you not have been unstitching? must he not have been unstitching? must we not have been unstitching? must you not have been unstitching? must they not have been unstitching?