must stitch
Regular verb: stitch - stitched- stitched

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must stitch
you must stitch
she must stitch
we must stitch
you must stitch
they must stitch 	I must be stitching
you must be stitching
she must be stitching
we must be stitching
you must be stitching
they must be stitching	I must have stitched
you must have stitched
she must have stitched
we must have stitched
you must have stitched
they must have stitched	I must have been stitching
you must have been stitching
she must have been stitching
we must have been stitching
you must have been stitching
they must have been stitching	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't stitch
you mustn't stitch
she mustn't stitch
we mustn't stitch
you mustn't stitch
they mustn't stitch 	I mustn't be stitching
you mustn't be stitching
she mustn't be stitching
we mustn't be stitching
you mustn't be stitching
they mustn't be stitching	I mustn't have stitched
you mustn't have stitched
she mustn't have stitched
we mustn't have stitched
you mustn't have stitched
they mustn't have stitched	I mustn't have been stitching
you mustn't have been stitching
she mustn't have been stitching
we mustn't have been stitching
you mustn't have been stitching
they mustn't have been stitching	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I stitch?
must you stitch?
must she stitch?
must we stitch?
must you stitch?
must they stitch? 	must I be stitching?
must you be stitching?
must she be stitching?
must we be stitching?
must you be stitching?
must they be stitching? 	must I have stitched?
must you have stitched?
must she have stitched?
must we have stitched?
must you have stitched?
must they have stitched? 	must I have been stitching?
must you have been stitching?
must she have been stitching?
must we have been stitching?
must you have been stitching?
must they have been stitching? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I stitch?
mustn't you stitch?
mustn't she stitch?
mustn't we stitch?
mustn't you stitch?
mustn't they stitch? 	mustn't I be stitching?
mustn't you be stitching?
mustn't she be stitching?
mustn't we be stitching?
mustn't you be stitching?
mustn't they be stitching? 	mustn't I have stitched?
mustn't you have stitched?
mustn't she have stitched?
mustn't we have stitched?
mustn't you have stitched?
mustn't they have stitched? 	mustn't I have been stitching?
mustn't you have been stitching?
mustn't she have been stitching?
mustn't we have been stitching?
mustn't you have been stitching?
mustn't they have been stitching?