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