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