I may extemporise you may extemporise he may extemporise we may extemporise you may extemporise they may extemporise
V-ing form
I may be extemporising you may be extemporising he may be extemporising we may be extemporising you may be extemporising they may be extemporising
Perfect
I may have extemporised you may have extemporised he may have extemporised we may have extemporised you may have extemporised they may have extemporised
V-ing perfect
I may have been extemporising you may have been extemporising he may have been extemporising we may have been extemporising you may have been extemporising they may have been extemporising
Negation
Simple form
I mayn't extemporise you mayn't extemporise he mayn't extemporise we mayn't extemporise you mayn't extemporise they mayn't extemporise
V-ing form
I mayn't be extemporising you mayn't be extemporising he mayn't be extemporising we mayn't be extemporising you mayn't be extemporising they mayn't be extemporising
Perfect
I mayn't have extemporised you mayn't have extemporised he mayn't have extemporised we mayn't have extemporised you mayn't have extemporised they mayn't have extemporised
V-ing perfect
I mayn't have been extemporising you mayn't have been extemporising he mayn't have been extemporising we mayn't have been extemporising you mayn't have been extemporising they mayn't have been extemporising
Interrogative form
Simple form
may I extemporise? may you extemporise? may he extemporise? may we extemporise? may you extemporise? may they extemporise?
V-ing form
may I be extemporising? may you be extemporising? may he be extemporising? may we be extemporising? may you be extemporising? may they be extemporising?
Perfect
may I have extemporised? may you have extemporised? may he have extemporised? may we have extemporised? may you have extemporised? may they have extemporised?
V-ing perfect
may I have been extemporising? may you have been extemporising? may he have been extemporising? may we have been extemporising? may you have been extemporising? may they have been extemporising?
Interro-negative form
Simple form
mayn't I extemporise? mayn't you extemporise? mayn't he extemporise? mayn't we extemporise? mayn't you extemporise? mayn't they extemporise?
V-ing form
mayn't I be extemporising? mayn't you be extemporising? mayn't he be extemporising? mayn't we be extemporising? mayn't you be extemporising? mayn't they be extemporising?
Perfect
mayn't I have extemporised? mayn't you have extemporised? mayn't he have extemporised? mayn't we have extemporised? mayn't you have extemporised? mayn't they have extemporised?
V-ing perfect
mayn't I have been extemporising? mayn't you have been extemporising? mayn't he have been extemporising? mayn't we have been extemporising? mayn't you have been extemporising? mayn't they have been extemporising?