I may retighten you may retighten she may retighten we may retighten you may retighten they may retighten
V-ing form
I may be retightening you may be retightening she may be retightening we may be retightening you may be retightening they may be retightening
Perfect
I may have retightened you may have retightened she may have retightened we may have retightened you may have retightened they may have retightened
V-ing perfect
I may have been retightening you may have been retightening she may have been retightening we may have been retightening you may have been retightening they may have been retightening
Negation
Simple form
I may not retighten you may not retighten she may not retighten we may not retighten you may not retighten they may not retighten
V-ing form
I may not be retightening you may not be retightening she may not be retightening we may not be retightening you may not be retightening they may not be retightening
Perfect
I may not have retightened you may not have retightened she may not have retightened we may not have retightened you may not have retightened they may not have retightened
V-ing perfect
I may not have been retightening you may not have been retightening she may not have been retightening we may not have been retightening you may not have been retightening they may not have been retightening
Interrogative form
Simple form
may I retighten? may you retighten? may she retighten? may we retighten? may you retighten? may they retighten?
V-ing form
may I be retightening? may you be retightening? may she be retightening? may we be retightening? may you be retightening? may they be retightening?
Perfect
may I have retightened? may you have retightened? may she have retightened? may we have retightened? may you have retightened? may they have retightened?
V-ing perfect
may I have been retightening? may you have been retightening? may she have been retightening? may we have been retightening? may you have been retightening? may they have been retightening?
Interro-negative form
Simple form
may I not retighten? may you not retighten? may she not retighten? may we not retighten? may you not retighten? may they not retighten?
V-ing form
may I not be retightening? may you not be retightening? may she not be retightening? may we not be retightening? may you not be retightening? may they not be retightening?
Perfect
may I not have retightened? may you not have retightened? may she not have retightened? may we not have retightened? may you not have retightened? may they not have retightened?
V-ing perfect
may I not have been retightening? may you not have been retightening? may she not have been retightening? may we not have been retightening? may you not have been retightening? may they not have been retightening?