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