I may systematise you may systematise he may systematise we may systematise you may systematise they may systematise
V-ing form
I may be systematising you may be systematising he may be systematising we may be systematising you may be systematising they may be systematising
Perfect
I may have systematised you may have systematised he may have systematised we may have systematised you may have systematised they may have systematised
V-ing perfect
I may have been systematising you may have been systematising he may have been systematising we may have been systematising you may have been systematising they may have been systematising
Negation
Simple form
I may not systematise you may not systematise he may not systematise we may not systematise you may not systematise they may not systematise
V-ing form
I may not be systematising you may not be systematising he may not be systematising we may not be systematising you may not be systematising they may not be systematising
Perfect
I may not have systematised you may not have systematised he may not have systematised we may not have systematised you may not have systematised they may not have systematised
V-ing perfect
I may not have been systematising you may not have been systematising he may not have been systematising we may not have been systematising you may not have been systematising they may not have been systematising
Interrogative form
Simple form
may I systematise? may you systematise? may he systematise? may we systematise? may you systematise? may they systematise?
V-ing form
may I be systematising? may you be systematising? may he be systematising? may we be systematising? may you be systematising? may they be systematising?
Perfect
may I have systematised? may you have systematised? may he have systematised? may we have systematised? may you have systematised? may they have systematised?
V-ing perfect
may I have been systematising? may you have been systematising? may he have been systematising? may we have been systematising? may you have been systematising? may they have been systematising?
Interro-negative form
Simple form
may I not systematise? may you not systematise? may he not systematise? may we not systematise? may you not systematise? may they not systematise?
V-ing form
may I not be systematising? may you not be systematising? may he not be systematising? may we not be systematising? may you not be systematising? may they not be systematising?
Perfect
may I not have systematised? may you not have systematised? may he not have systematised? may we not have systematised? may you not have systematised? may they not have systematised?
V-ing perfect
may I not have been systematising? may you not have been systematising? may he not have been systematising? may we not have been systematising? may you not have been systematising? may they not have been systematising?