English verb conjugation
MAY SHARPEN

Regular verb: sharpen - sharpened - sharpened

Affirmation

Simple form	V-ing form
I may sharpen you may sharpen he may sharpen we may sharpen you may sharpen they may sharpen	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	V-ing 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	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	V-ing form
I may not sharpen you may not sharpen he may not sharpen we may not sharpen you may not sharpen they may not sharpen	I may not be sharpening you may not be sharpening he may not be sharpening we may not be sharpening you may not be sharpening they may not be sharpening
Perfect	V-ing perfect
I may not have sharpened you may not have sharpened he may not have sharpened we may not have sharpened you may not have sharpened they may not have sharpened	I may not have been sharpening you may not have been sharpening he 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	V-ing form
may I sharpen? may you sharpen? may he sharpen? may we sharpen? may you sharpen? may they sharpen?	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	V-ing 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?	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	V-ing form
may I not sharpen? may you not sharpen? may he not sharpen? may we not sharpen? may you not sharpen? may they not sharpen?	may I not be sharpening? may you not be sharpening? may he not be sharpening? may we not be sharpening? may you not be sharpening? may they not be sharpening?
Perfect	V-ing perfect
may I not have sharpened? may you not have sharpened? may he not have sharpened? may we not have sharpened? may you not have sharpened? may they not have sharpened?	may I not have been sharpening? may you not have been sharpening? may he not have been sharpening? may we not have been sharpening? may you not have been sharpening? may they not have been sharpening?