I may retain you may retain he may retain we may retain you may retain they may retain
V-ing form
I may be retaining you may be retaining he may be retaining we may be retaining you may be retaining they may be retaining
Perfect
I may have retained you may have retained he may have retained we may have retained you may have retained they may have retained
V-ing perfect
I may have been retaining you may have been retaining he may have been retaining we may have been retaining you may have been retaining they may have been retaining
Negation
Simple form
I may not retain you may not retain he may not retain we may not retain you may not retain they may not retain
V-ing form
I may not be retaining you may not be retaining he may not be retaining we may not be retaining you may not be retaining they may not be retaining
Perfect
I may not have retained you may not have retained he may not have retained we may not have retained you may not have retained they may not have retained
V-ing perfect
I may not have been retaining you may not have been retaining he may not have been retaining we may not have been retaining you may not have been retaining they may not have been retaining
Interrogative form
Simple form
may I retain? may you retain? may he retain? may we retain? may you retain? may they retain?
V-ing form
may I be retaining? may you be retaining? may he be retaining? may we be retaining? may you be retaining? may they be retaining?
Perfect
may I have retained? may you have retained? may he have retained? may we have retained? may you have retained? may they have retained?
V-ing perfect
may I have been retaining? may you have been retaining? may he have been retaining? may we have been retaining? may you have been retaining? may they have been retaining?
Interro-negative form
Simple form
may I not retain? may you not retain? may he not retain? may we not retain? may you not retain? may they not retain?
V-ing form
may I not be retaining? may you not be retaining? may he not be retaining? may we not be retaining? may you not be retaining? may they not be retaining?
Perfect
may I not have retained? may you not have retained? may he not have retained? may we not have retained? may you not have retained? may they not have retained?
V-ing perfect
may I not have been retaining? may you not have been retaining? may he not have been retaining? may we not have been retaining? may you not have been retaining? may they not have been retaining?