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 may not tub you may not tub she may not tub we may not tub you may not tub they may not tub
V-ing form
I may not be tubbing you may not be tubbing she may not be tubbing we may not be tubbing you may not be tubbing they may not be tubbing
Perfect
I may not have tubbed you may not have tubbed she may not have tubbed we may not have tubbed you may not have tubbed they may not have tubbed
V-ing perfect
I may not have been tubbing you may not have been tubbing she may not have been tubbing we may not have been tubbing you may not have been tubbing they may not 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
may I not tub? may you not tub? may she not tub? may we not tub? may you not tub? may they not tub?
V-ing form
may I not be tubbing? may you not be tubbing? may she not be tubbing? may we not be tubbing? may you not be tubbing? may they not be tubbing?
Perfect
may I not have tubbed? may you not have tubbed? may she not have tubbed? may we not have tubbed? may you not have tubbed? may they not have tubbed?
V-ing perfect
may I not have been tubbing? may you not have been tubbing? may she not have been tubbing? may we not have been tubbing? may you not have been tubbing? may they not have been tubbing?