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 mustn't unstitch you mustn't unstitch he mustn't unstitch we mustn't unstitch you mustn't unstitch they mustn't unstitch	I mustn't be unstitching you mustn't be unstitching he mustn't be unstitching we mustn't be unstitching you mustn't be unstitching they mustn't be unstitching
Perfect	V-ing perfect
I mustn't have unstitched you mustn't have unstitched he mustn't have unstitched we mustn't have unstitched you mustn't have unstitched they mustn't have unstitched	I mustn't have been unstitching you mustn't have been unstitching he mustn't have been unstitching we mustn't have been unstitching you mustn't have been unstitching they mustn't 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
mustn't I unstitch? mustn't you unstitch? mustn't he unstitch? mustn't we unstitch? mustn't you unstitch? mustn't they unstitch?	mustn't I be unstitching? mustn't you be unstitching? mustn't he be unstitching? mustn't we be unstitching? mustn't you be unstitching? mustn't they be unstitching?
Perfect	V-ing perfect
mustn't I have unstitched? mustn't you have unstitched? mustn't he have unstitched? mustn't we have unstitched? mustn't you have unstitched? mustn't they have unstitched?	mustn't I have been unstitching? mustn't you have been unstitching? mustn't he have been unstitching? mustn't we have been unstitching? mustn't you have been unstitching? mustn't they have been unstitching?