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 mayn't systematise you mayn't systematise he mayn't systematise we mayn't systematise you mayn't systematise they mayn't systematise
V-ing form
I mayn't be systematising you mayn't be systematising he mayn't be systematising we mayn't be systematising you mayn't be systematising they mayn't be systematising
Perfect
I mayn't have systematised you mayn't have systematised he mayn't have systematised we mayn't have systematised you mayn't have systematised they mayn't have systematised
V-ing perfect
I mayn't have been systematising you mayn't have been systematising he mayn't have been systematising we mayn't have been systematising you mayn't have been systematising they mayn't 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
mayn't I systematise? mayn't you systematise? mayn't he systematise? mayn't we systematise? mayn't you systematise? mayn't they systematise?
V-ing form
mayn't I be systematising? mayn't you be systematising? mayn't he be systematising? mayn't we be systematising? mayn't you be systematising? mayn't they be systematising?
Perfect
mayn't I have systematised? mayn't you have systematised? mayn't he have systematised? mayn't we have systematised? mayn't you have systematised? mayn't they have systematised?
V-ing perfect
mayn't I have been systematising? mayn't you have been systematising? mayn't he have been systematising? mayn't we have been systematising? mayn't you have been systematising? mayn't they have been systematising?