Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I may heavier you may heavier he may heavier we may heavier you may heavier they may heavier
V-ing form
I may be heaviering you may be heaviering he may be heaviering we may be heaviering you may be heaviering they may be heaviering
Perfect
I may have heaviered you may have heaviered he may have heaviered we may have heaviered you may have heaviered they may have heaviered
V-ing perfect
I may have been heaviering you may have been heaviering he may have been heaviering we may have been heaviering you may have been heaviering they may have been heaviering
Negation
Simple form
I mayn't heavier you mayn't heavier he mayn't heavier we mayn't heavier you mayn't heavier they mayn't heavier
V-ing form
I mayn't be heaviering you mayn't be heaviering he mayn't be heaviering we mayn't be heaviering you mayn't be heaviering they mayn't be heaviering
Perfect
I mayn't have heaviered you mayn't have heaviered he mayn't have heaviered we mayn't have heaviered you mayn't have heaviered they mayn't have heaviered
V-ing perfect
I mayn't have been heaviering you mayn't have been heaviering he mayn't have been heaviering we mayn't have been heaviering you mayn't have been heaviering they mayn't have been heaviering
Interrogative form
Simple form
may I heavier? may you heavier? may he heavier? may we heavier? may you heavier? may they heavier?
V-ing form
may I be heaviering? may you be heaviering? may he be heaviering? may we be heaviering? may you be heaviering? may they be heaviering?
Perfect
may I have heaviered? may you have heaviered? may he have heaviered? may we have heaviered? may you have heaviered? may they have heaviered?
V-ing perfect
may I have been heaviering? may you have been heaviering? may he have been heaviering? may we have been heaviering? may you have been heaviering? may they have been heaviering?
Interro-negative form
Simple form
mayn't I heavier? mayn't you heavier? mayn't he heavier? mayn't we heavier? mayn't you heavier? mayn't they heavier?
V-ing form
mayn't I be heaviering? mayn't you be heaviering? mayn't he be heaviering? mayn't we be heaviering? mayn't you be heaviering? mayn't they be heaviering?
Perfect
mayn't I have heaviered? mayn't you have heaviered? mayn't he have heaviered? mayn't we have heaviered? mayn't you have heaviered? mayn't they have heaviered?
V-ing perfect
mayn't I have been heaviering? mayn't you have been heaviering? mayn't he have been heaviering? mayn't we have been heaviering? mayn't you have been heaviering? mayn't they have been heaviering?