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