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