English verb conjugation
MUST OVERTIGHTEN

Regular verb: overtighten - overtightened - overtightened

Affirmation

Simple form	V-ing form
I must overtighten you must overtighten she must overtighten we must overtighten you must overtighten they must overtighten	I must be overtightening you must be overtightening she must be overtightening we must be overtightening you must be overtightening they must be overtightening
Perfect	V-ing perfect
I must have overtightened you must have overtightened she must have overtightened we must have overtightened you must have overtightened they must have overtightened	I must have been overtightening you must have been overtightening she must have been overtightening we must have been overtightening you must have been overtightening they must have been overtightening

Negation

Simple form	V-ing form
I mustn't overtighten you mustn't overtighten she mustn't overtighten we mustn't overtighten you mustn't overtighten they mustn't overtighten	I mustn't be overtightening you mustn't be overtightening she mustn't be overtightening we mustn't be overtightening you mustn't be overtightening they mustn't be overtightening
Perfect	V-ing perfect
I mustn't have overtightened you mustn't have overtightened she mustn't have overtightened we mustn't have overtightened you mustn't have overtightened they mustn't have overtightened	I mustn't have been overtightening you mustn't have been overtightening she mustn't have been overtightening we mustn't have been overtightening you mustn't have been overtightening they mustn't have been overtightening

Interrogative form

Simple form	V-ing form
must I overtighten? must you overtighten? must she overtighten? must we overtighten? must you overtighten? must they overtighten?	must I be overtightening? must you be overtightening? must she be overtightening? must we be overtightening? must you be overtightening? must they be overtightening?
Perfect	V-ing perfect
must I have overtightened? must you have overtightened? must she have overtightened? must we have overtightened? must you have overtightened? must they have overtightened?	must I have been overtightening? must you have been overtightening? must she have been overtightening? must we have been overtightening? must you have been overtightening? must they have been overtightening?

Interro-negative form

Simple form	V-ing form
mustn't I overtighten? mustn't you overtighten? mustn't she overtighten? mustn't we overtighten? mustn't you overtighten? mustn't they overtighten?	mustn't I be overtightening? mustn't you be overtightening? mustn't she be overtightening? mustn't we be overtightening? mustn't you be overtightening? mustn't they be overtightening?
Perfect	V-ing perfect
mustn't I have overtightened? mustn't you have overtightened? mustn't she have overtightened? mustn't we have overtightened? mustn't you have overtightened? mustn't they have overtightened?	mustn't I have been overtightening? mustn't you have been overtightening? mustn't she have been overtightening? mustn't we have been overtightening? mustn't you have been overtightening? mustn't they have been overtightening?