I may sharpen you may sharpen she may sharpen we may sharpen you may sharpen they may sharpen
V-ing form
I may be sharpening you may be sharpening she may be sharpening we may be sharpening you may be sharpening they may be sharpening
Perfect
I may have sharpened you may have sharpened she 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 she may have been sharpening we may have been sharpening you may have been sharpening they may have been sharpening
Negation
Simple form
I may not sharpen you may not sharpen she may not sharpen we may not sharpen you may not sharpen they may not sharpen
V-ing form
I may not be sharpening you may not be sharpening she may not be sharpening we may not be sharpening you may not be sharpening they may not be sharpening
Perfect
I may not have sharpened you may not have sharpened she may not have sharpened we may not have sharpened you may not have sharpened they may not have sharpened
V-ing perfect
I may not have been sharpening you may not have been sharpening she may not have been sharpening we may not have been sharpening you may not have been sharpening they may not have been sharpening
Interrogative form
Simple form
may I sharpen? may you sharpen? may she sharpen? may we sharpen? may you sharpen? may they sharpen?
V-ing form
may I be sharpening? may you be sharpening? may she be sharpening? may we be sharpening? may you be sharpening? may they be sharpening?
Perfect
may I have sharpened? may you have sharpened? may she 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 she have been sharpening? may we have been sharpening? may you have been sharpening? may they have been sharpening?
Interro-negative form
Simple form
may I not sharpen? may you not sharpen? may she not sharpen? may we not sharpen? may you not sharpen? may they not sharpen?
V-ing form
may I not be sharpening? may you not be sharpening? may she not be sharpening? may we not be sharpening? may you not be sharpening? may they not be sharpening?
Perfect
may I not have sharpened? may you not have sharpened? may she not have sharpened? may we not have sharpened? may you not have sharpened? may they not have sharpened?
V-ing perfect
may I not have been sharpening? may you not have been sharpening? may she not have been sharpening? may we not have been sharpening? may you not have been sharpening? may they not have been sharpening?