may sharpen
Regular verb: sharpen - sharpened- sharpened

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may sharpen
you may sharpen
she may sharpen
we may sharpen
you may sharpen
they may sharpen 	I may be sharpening
you may be sharpening
she may be sharpening
we may be sharpening
you may be sharpening
they may be sharpening	I may have sharpened
you may have sharpened
she 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
she 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 	Perfect 	V-ing perfect 	
I mayn't sharpen
you mayn't sharpen
she mayn't sharpen
we mayn't sharpen
you mayn't sharpen
they mayn't sharpen 	I mayn't be sharpening
you mayn't be sharpening
she mayn't be sharpening
we mayn't be sharpening
you mayn't be sharpening
they mayn't be sharpening	I mayn't have sharpened
you mayn't have sharpened
she mayn't have sharpened
we mayn't have sharpened
you mayn't have sharpened
they mayn't have sharpened	I mayn't have been sharpening
you mayn't have been sharpening
she 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 	V-ing form 	Perfect 	V-ing perfect 	
may I sharpen?
may you sharpen?
may she sharpen?
may we sharpen?
may you sharpen?
may they sharpen? 	may I be sharpening?
may you be sharpening?
may she be sharpening?
may we be sharpening?
may you be sharpening?
may they be sharpening? 	may I have sharpened?
may you have sharpened?
may she 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 she 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 	Perfect 	V-ing perfect 	
mayn't I sharpen?
mayn't you sharpen?
mayn't she sharpen?
mayn't we sharpen?
mayn't you sharpen?
mayn't they sharpen? 	mayn't I be sharpening?
mayn't you be sharpening?
mayn't she be sharpening?
mayn't we be sharpening?
mayn't you be sharpening?
mayn't they be sharpening? 	mayn't I have sharpened?
mayn't you have sharpened?
mayn't she have sharpened?
mayn't we have sharpened?
mayn't you have sharpened?
mayn't they have sharpened? 	mayn't I have been sharpening?
mayn't you have been sharpening?
mayn't she have been sharpening?
mayn't we have been sharpening?
mayn't you have been sharpening?
mayn't they have been sharpening?