I may retrogress you may retrogress she may retrogress we may retrogress you may retrogress they may retrogress
V-ing form
I may be retrogressing you may be retrogressing she may be retrogressing we may be retrogressing you may be retrogressing they may be retrogressing
Perfect
I may have retrogressed you may have retrogressed she may have retrogressed we may have retrogressed you may have retrogressed they may have retrogressed
V-ing perfect
I may have been retrogressing you may have been retrogressing she may have been retrogressing we may have been retrogressing you may have been retrogressing they may have been retrogressing
Negation
Simple form
I may not retrogress you may not retrogress she may not retrogress we may not retrogress you may not retrogress they may not retrogress
V-ing form
I may not be retrogressing you may not be retrogressing she may not be retrogressing we may not be retrogressing you may not be retrogressing they may not be retrogressing
Perfect
I may not have retrogressed you may not have retrogressed she may not have retrogressed we may not have retrogressed you may not have retrogressed they may not have retrogressed
V-ing perfect
I may not have been retrogressing you may not have been retrogressing she may not have been retrogressing we may not have been retrogressing you may not have been retrogressing they may not have been retrogressing
Interrogative form
Simple form
may I retrogress? may you retrogress? may she retrogress? may we retrogress? may you retrogress? may they retrogress?
V-ing form
may I be retrogressing? may you be retrogressing? may she be retrogressing? may we be retrogressing? may you be retrogressing? may they be retrogressing?
Perfect
may I have retrogressed? may you have retrogressed? may she have retrogressed? may we have retrogressed? may you have retrogressed? may they have retrogressed?
V-ing perfect
may I have been retrogressing? may you have been retrogressing? may she have been retrogressing? may we have been retrogressing? may you have been retrogressing? may they have been retrogressing?
Interro-negative form
Simple form
may I not retrogress? may you not retrogress? may she not retrogress? may we not retrogress? may you not retrogress? may they not retrogress?
V-ing form
may I not be retrogressing? may you not be retrogressing? may she not be retrogressing? may we not be retrogressing? may you not be retrogressing? may they not be retrogressing?
Perfect
may I not have retrogressed? may you not have retrogressed? may she not have retrogressed? may we not have retrogressed? may you not have retrogressed? may they not have retrogressed?
V-ing perfect
may I not have been retrogressing? may you not have been retrogressing? may she not have been retrogressing? may we not have been retrogressing? may you not have been retrogressing? may they not have been retrogressing?