I may tub you may tub she may tub we may tub you may tub they may tub
V-ing form
I may be tubbing you may be tubbing she may be tubbing we may be tubbing you may be tubbing they may be tubbing
Perfect
I may have tubbed you may have tubbed she may have tubbed we may have tubbed you may have tubbed they may have tubbed
V-ing perfect
I may have been tubbing you may have been tubbing she may have been tubbing we may have been tubbing you may have been tubbing they may have been tubbing
Negation
Simple form
I mayn't tub you mayn't tub she mayn't tub we mayn't tub you mayn't tub they mayn't tub
V-ing form
I mayn't be tubbing you mayn't be tubbing she mayn't be tubbing we mayn't be tubbing you mayn't be tubbing they mayn't be tubbing
Perfect
I mayn't have tubbed you mayn't have tubbed she mayn't have tubbed we mayn't have tubbed you mayn't have tubbed they mayn't have tubbed
V-ing perfect
I mayn't have been tubbing you mayn't have been tubbing she mayn't have been tubbing we mayn't have been tubbing you mayn't have been tubbing they mayn't have been tubbing
Interrogative form
Simple form
may I tub? may you tub? may she tub? may we tub? may you tub? may they tub?
V-ing form
may I be tubbing? may you be tubbing? may she be tubbing? may we be tubbing? may you be tubbing? may they be tubbing?
Perfect
may I have tubbed? may you have tubbed? may she have tubbed? may we have tubbed? may you have tubbed? may they have tubbed?
V-ing perfect
may I have been tubbing? may you have been tubbing? may she have been tubbing? may we have been tubbing? may you have been tubbing? may they have been tubbing?
Interro-negative form
Simple form
mayn't I tub? mayn't you tub? mayn't she tub? mayn't we tub? mayn't you tub? mayn't they tub?
V-ing form
mayn't I be tubbing? mayn't you be tubbing? mayn't she be tubbing? mayn't we be tubbing? mayn't you be tubbing? mayn't they be tubbing?
Perfect
mayn't I have tubbed? mayn't you have tubbed? mayn't she have tubbed? mayn't we have tubbed? mayn't you have tubbed? mayn't they have tubbed?
V-ing perfect
mayn't I have been tubbing? mayn't you have been tubbing? mayn't she have been tubbing? mayn't we have been tubbing? mayn't you have been tubbing? mayn't they have been tubbing?