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