I may heave you may heave he may heave we may heave you may heave they may heave
V-ing form
I may be heaving you may be heaving he 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 he 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 he 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 he 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 he 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 he 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 he 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 he heave? may we heave? may you heave? may they heave?
V-ing form
may I be heaving? may you be heaving? may he 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 he 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 he 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 he 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 he 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 he 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 he have been heaving? mayn't we have been heaving? mayn't you have been heaving? mayn't they have been heaving?