I may goof you may goof she may goof we may goof you may goof they may goof
V-ing form
I may be goofing you may be goofing she may be goofing we may be goofing you may be goofing they may be goofing
Perfect
I may have goofed you may have goofed she 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 she 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 she 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 she 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 she 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 she 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 she goof? may we goof? may you goof? may they goof?
V-ing form
may I be goofing? may you be goofing? may she be goofing? may we be goofing? may you be goofing? may they be goofing?
Perfect
may I have goofed? may you have goofed? may she 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 she 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 she 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 she 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 she 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 she have been goofing? mayn't we have been goofing? mayn't you have been goofing? mayn't they have been goofing?