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