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