I may heave you may heave she may heave we may heave you may heave they may heave
V-ing form
I may be heaving you may be heaving she may be heaving we may be heaving you may be heaving they may be heaving
Perfect
I may have heaved, hove you may have heaved, hove she may have heaved, hove we may have heaved, hove you may have heaved, hove they may have heaved, hove
V-ing perfect
I may have been heaving you may have been heaving she may have been heaving we may have been heaving you may have been heaving they may have been heaving
Negation
Simple form
I mayn't heave you mayn't heave she mayn't heave we mayn't heave you mayn't heave they mayn't heave
V-ing form
I mayn't be heaving you mayn't be heaving she mayn't be heaving we mayn't be heaving you mayn't be heaving they mayn't be heaving
Perfect
I mayn't have heaved, hove you mayn't have heaved, hove she mayn't have heaved, hove we mayn't have heaved, hove you mayn't have heaved, hove they mayn't have heaved, hove
V-ing perfect
I mayn't have been heaving you mayn't have been heaving she mayn't have been heaving we mayn't have been heaving you mayn't have been heaving they mayn't have been heaving
Interrogative form
Simple form
may I heave? may you heave? may she heave? may we heave? may you heave? may they heave?
V-ing form
may I be heaving? may you be heaving? may she be heaving? may we be heaving? may you be heaving? may they be heaving?
Perfect
may I have heaved, hove? may you have heaved, hove? may she have heaved, hove? may we have heaved, hove? may you have heaved, hove? may they have heaved, hove?
V-ing perfect
may I have been heaving? may you have been heaving? may she have been heaving? may we have been heaving? may you have been heaving? may they have been heaving?
Interro-negative form
Simple form
mayn't I heave? mayn't you heave? mayn't she heave? mayn't we heave? mayn't you heave? mayn't they heave?
V-ing form
mayn't I be heaving? mayn't you be heaving? mayn't she be heaving? mayn't we be heaving? mayn't you be heaving? mayn't they be heaving?
Perfect
mayn't I have heaved, hove? mayn't you have heaved, hove? mayn't she have heaved, hove? mayn't we have heaved, hove? mayn't you have heaved, hove? mayn't they have heaved, hove?
V-ing perfect
mayn't I have been heaving? mayn't you have been heaving? mayn't she have been heaving? mayn't we have been heaving? mayn't you have been heaving? mayn't they have been heaving?