I may antedate you may antedate he may antedate we may antedate you may antedate they may antedate
V-ing form
I may be antedating you may be antedating he may be antedating we may be antedating you may be antedating they may be antedating
Perfect
I may have antedated you may have antedated he may have antedated we may have antedated you may have antedated they may have antedated
V-ing perfect
I may have been antedating you may have been antedating he may have been antedating we may have been antedating you may have been antedating they may have been antedating
Negation
Simple form
I mayn't antedate you mayn't antedate he mayn't antedate we mayn't antedate you mayn't antedate they mayn't antedate
V-ing form
I mayn't be antedating you mayn't be antedating he mayn't be antedating we mayn't be antedating you mayn't be antedating they mayn't be antedating
Perfect
I mayn't have antedated you mayn't have antedated he mayn't have antedated we mayn't have antedated you mayn't have antedated they mayn't have antedated
V-ing perfect
I mayn't have been antedating you mayn't have been antedating he mayn't have been antedating we mayn't have been antedating you mayn't have been antedating they mayn't have been antedating
Interrogative form
Simple form
may I antedate? may you antedate? may he antedate? may we antedate? may you antedate? may they antedate?
V-ing form
may I be antedating? may you be antedating? may he be antedating? may we be antedating? may you be antedating? may they be antedating?
Perfect
may I have antedated? may you have antedated? may he have antedated? may we have antedated? may you have antedated? may they have antedated?
V-ing perfect
may I have been antedating? may you have been antedating? may he have been antedating? may we have been antedating? may you have been antedating? may they have been antedating?
Interro-negative form
Simple form
mayn't I antedate? mayn't you antedate? mayn't he antedate? mayn't we antedate? mayn't you antedate? mayn't they antedate?
V-ing form
mayn't I be antedating? mayn't you be antedating? mayn't he be antedating? mayn't we be antedating? mayn't you be antedating? mayn't they be antedating?
Perfect
mayn't I have antedated? mayn't you have antedated? mayn't he have antedated? mayn't we have antedated? mayn't you have antedated? mayn't they have antedated?
V-ing perfect
mayn't I have been antedating? mayn't you have been antedating? mayn't he have been antedating? mayn't we have been antedating? mayn't you have been antedating? mayn't they have been antedating?