I must stitch you must stitch he must stitch we must stitch you must stitch they must stitch
Forma con V-ing
I must be stitching you must be stitching he must be stitching we must be stitching you must be stitching they must be stitching
Perfecto
I must have stitched you must have stitched he must have stitched we must have stitched you must have stitched they must have stitched
Perfecto con V-ing
I must have been stitching you must have been stitching he must have been stitching we must have been stitching you must have been stitching they must have been stitching
Negación
Forma simple
I mustn't stitch you mustn't stitch he mustn't stitch we mustn't stitch you mustn't stitch they mustn't stitch
Forma con V-ing
I mustn't be stitching you mustn't be stitching he mustn't be stitching we mustn't be stitching you mustn't be stitching they mustn't be stitching
Perfecto
I mustn't have stitched you mustn't have stitched he mustn't have stitched we mustn't have stitched you mustn't have stitched they mustn't have stitched
Perfecto con V-ing
I mustn't have been stitching you mustn't have been stitching he mustn't have been stitching we mustn't have been stitching you mustn't have been stitching they mustn't have been stitching
Forma interrogativa
Forma simple
must I stitch? must you stitch? must he stitch? must we stitch? must you stitch? must they stitch?
Forma con V-ing
must I be stitching? must you be stitching? must he be stitching? must we be stitching? must you be stitching? must they be stitching?
Perfecto
must I have stitched? must you have stitched? must he have stitched? must we have stitched? must you have stitched? must they have stitched?
Perfecto con V-ing
must I have been stitching? must you have been stitching? must he have been stitching? must we have been stitching? must you have been stitching? must they have been stitching?
Forma interro-negativa
Forma simple
mustn't I stitch? mustn't you stitch? mustn't he stitch? mustn't we stitch? mustn't you stitch? mustn't they stitch?
Forma con V-ing
mustn't I be stitching? mustn't you be stitching? mustn't he be stitching? mustn't we be stitching? mustn't you be stitching? mustn't they be stitching?
Perfecto
mustn't I have stitched? mustn't you have stitched? mustn't he have stitched? mustn't we have stitched? mustn't you have stitched? mustn't they have stitched?
Perfecto con V-ing
mustn't I have been stitching? mustn't you have been stitching? mustn't he have been stitching? mustn't we have been stitching? mustn't you have been stitching? mustn't they have been stitching?