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