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