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