I may shift you may shift he may shift we may shift you may shift they may shift
V-ing form
I may be shifting you may be shifting he may be shifting we may be shifting you may be shifting they may be shifting
Perfect
I may have shifted you may have shifted he may have shifted we may have shifted you may have shifted they may have shifted
V-ing perfect
I may have been shifting you may have been shifting he may have been shifting we may have been shifting you may have been shifting they may have been shifting
Negation
Simple form
I may not shift you may not shift he may not shift we may not shift you may not shift they may not shift
V-ing form
I may not be shifting you may not be shifting he may not be shifting we may not be shifting you may not be shifting they may not be shifting
Perfect
I may not have shifted you may not have shifted he may not have shifted we may not have shifted you may not have shifted they may not have shifted
V-ing perfect
I may not have been shifting you may not have been shifting he may not have been shifting we may not have been shifting you may not have been shifting they may not have been shifting
Interrogative form
Simple form
may I shift? may you shift? may he shift? may we shift? may you shift? may they shift?
V-ing form
may I be shifting? may you be shifting? may he be shifting? may we be shifting? may you be shifting? may they be shifting?
Perfect
may I have shifted? may you have shifted? may he have shifted? may we have shifted? may you have shifted? may they have shifted?
V-ing perfect
may I have been shifting? may you have been shifting? may he have been shifting? may we have been shifting? may you have been shifting? may they have been shifting?
Interro-negative form
Simple form
may I not shift? may you not shift? may he not shift? may we not shift? may you not shift? may they not shift?
V-ing form
may I not be shifting? may you not be shifting? may he not be shifting? may we not be shifting? may you not be shifting? may they not be shifting?
Perfect
may I not have shifted? may you not have shifted? may he not have shifted? may we not have shifted? may you not have shifted? may they not have shifted?
V-ing perfect
may I not have been shifting? may you not have been shifting? may he not have been shifting? may we not have been shifting? may you not have been shifting? may they not have been shifting?