I may backstitch you may backstitch he may backstitch we may backstitch you may backstitch they may backstitch
V-ing form
I may be backstitching you may be backstitching he may be backstitching we may be backstitching you may be backstitching they may be backstitching
Perfect
I may have backstitched you may have backstitched he may have backstitched we may have backstitched you may have backstitched they may have backstitched
V-ing perfect
I may have been backstitching you may have been backstitching he may have been backstitching we may have been backstitching you may have been backstitching they may have been backstitching
Negation
Simple form
I mayn't backstitch you mayn't backstitch he mayn't backstitch we mayn't backstitch you mayn't backstitch they mayn't backstitch
V-ing form
I mayn't be backstitching you mayn't be backstitching he mayn't be backstitching we mayn't be backstitching you mayn't be backstitching they mayn't be backstitching
Perfect
I mayn't have backstitched you mayn't have backstitched he mayn't have backstitched we mayn't have backstitched you mayn't have backstitched they mayn't have backstitched
V-ing perfect
I mayn't have been backstitching you mayn't have been backstitching he mayn't have been backstitching we mayn't have been backstitching you mayn't have been backstitching they mayn't have been backstitching
Interrogative form
Simple form
may I backstitch? may you backstitch? may he backstitch? may we backstitch? may you backstitch? may they backstitch?
V-ing form
may I be backstitching? may you be backstitching? may he be backstitching? may we be backstitching? may you be backstitching? may they be backstitching?
Perfect
may I have backstitched? may you have backstitched? may he have backstitched? may we have backstitched? may you have backstitched? may they have backstitched?
V-ing perfect
may I have been backstitching? may you have been backstitching? may he have been backstitching? may we have been backstitching? may you have been backstitching? may they have been backstitching?
Interro-negative form
Simple form
mayn't I backstitch? mayn't you backstitch? mayn't he backstitch? mayn't we backstitch? mayn't you backstitch? mayn't they backstitch?
V-ing form
mayn't I be backstitching? mayn't you be backstitching? mayn't he be backstitching? mayn't we be backstitching? mayn't you be backstitching? mayn't they be backstitching?
Perfect
mayn't I have backstitched? mayn't you have backstitched? mayn't he have backstitched? mayn't we have backstitched? mayn't you have backstitched? mayn't they have backstitched?
V-ing perfect
mayn't I have been backstitching? mayn't you have been backstitching? mayn't he have been backstitching? mayn't we have been backstitching? mayn't you have been backstitching? mayn't they have been backstitching?