English verb conjugation
MAY STAIN

Regular verb: stain - stained - stained

Affirmation

Simple form	V-ing form
I may stain you may stain he may stain we may stain you may stain they may stain	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	V-ing 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	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	V-ing 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	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	V-ing 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	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	V-ing form
may I stain? may you stain? may he stain? may we stain? may you stain? may they stain?	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	V-ing 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?	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	V-ing 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?	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	V-ing 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?	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?