may unscrew
Regular verb: unscrew - unscrewed- unscrewed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may unscrew
you may unscrew
she may unscrew
we may unscrew
you may unscrew
they may unscrew 	I may be unscrewing
you may be unscrewing
she may be unscrewing
we may be unscrewing
you may be unscrewing
they may be unscrewing	I may have unscrewed
you may have unscrewed
she may have unscrewed
we may have unscrewed
you may have unscrewed
they may have unscrewed	I may have been unscrewing
you may have been unscrewing
she may have been unscrewing
we may have been unscrewing
you may have been unscrewing
they may have been unscrewing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't unscrew
you mayn't unscrew
she mayn't unscrew
we mayn't unscrew
you mayn't unscrew
they mayn't unscrew 	I mayn't be unscrewing
you mayn't be unscrewing
she mayn't be unscrewing
we mayn't be unscrewing
you mayn't be unscrewing
they mayn't be unscrewing	I mayn't have unscrewed
you mayn't have unscrewed
she mayn't have unscrewed
we mayn't have unscrewed
you mayn't have unscrewed
they mayn't have unscrewed	I mayn't have been unscrewing
you mayn't have been unscrewing
she mayn't have been unscrewing
we mayn't have been unscrewing
you mayn't have been unscrewing
they mayn't have been unscrewing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I unscrew?
may you unscrew?
may she unscrew?
may we unscrew?
may you unscrew?
may they unscrew? 	may I be unscrewing?
may you be unscrewing?
may she be unscrewing?
may we be unscrewing?
may you be unscrewing?
may they be unscrewing? 	may I have unscrewed?
may you have unscrewed?
may she have unscrewed?
may we have unscrewed?
may you have unscrewed?
may they have unscrewed? 	may I have been unscrewing?
may you have been unscrewing?
may she have been unscrewing?
may we have been unscrewing?
may you have been unscrewing?
may they have been unscrewing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I unscrew?
mayn't you unscrew?
mayn't she unscrew?
mayn't we unscrew?
mayn't you unscrew?
mayn't they unscrew? 	mayn't I be unscrewing?
mayn't you be unscrewing?
mayn't she be unscrewing?
mayn't we be unscrewing?
mayn't you be unscrewing?
mayn't they be unscrewing? 	mayn't I have unscrewed?
mayn't you have unscrewed?
mayn't she have unscrewed?
mayn't we have unscrewed?
mayn't you have unscrewed?
mayn't they have unscrewed? 	mayn't I have been unscrewing?
mayn't you have been unscrewing?
mayn't she have been unscrewing?
mayn't we have been unscrewing?
mayn't you have been unscrewing?
mayn't they have been unscrewing?