I may screw you may screw she may screw we may screw you may screw they may screw
V-ing form
I may be screwing you may be screwing she may be screwing we may be screwing you may be screwing they may be screwing
Perfect
I may have screwed you may have screwed she may have screwed we may have screwed you may have screwed they may have screwed
V-ing perfect
I may have been screwing you may have been screwing she may have been screwing we may have been screwing you may have been screwing they may have been screwing
Negation
Simple form
I mayn't screw you mayn't screw she mayn't screw we mayn't screw you mayn't screw they mayn't screw
V-ing form
I mayn't be screwing you mayn't be screwing she mayn't be screwing we mayn't be screwing you mayn't be screwing they mayn't be screwing
Perfect
I mayn't have screwed you mayn't have screwed she mayn't have screwed we mayn't have screwed you mayn't have screwed they mayn't have screwed
V-ing perfect
I mayn't have been screwing you mayn't have been screwing she mayn't have been screwing we mayn't have been screwing you mayn't have been screwing they mayn't have been screwing
Interrogative form
Simple form
may I screw? may you screw? may she screw? may we screw? may you screw? may they screw?
V-ing form
may I be screwing? may you be screwing? may she be screwing? may we be screwing? may you be screwing? may they be screwing?
Perfect
may I have screwed? may you have screwed? may she have screwed? may we have screwed? may you have screwed? may they have screwed?
V-ing perfect
may I have been screwing? may you have been screwing? may she have been screwing? may we have been screwing? may you have been screwing? may they have been screwing?
Interro-negative form
Simple form
mayn't I screw? mayn't you screw? mayn't she screw? mayn't we screw? mayn't you screw? mayn't they screw?
V-ing form
mayn't I be screwing? mayn't you be screwing? mayn't she be screwing? mayn't we be screwing? mayn't you be screwing? mayn't they be screwing?
Perfect
mayn't I have screwed? mayn't you have screwed? mayn't she have screwed? mayn't we have screwed? mayn't you have screwed? mayn't they have screwed?
V-ing perfect
mayn't I have been screwing? mayn't you have been screwing? mayn't she have been screwing? mayn't we have been screwing? mayn't you have been screwing? mayn't they have been screwing?