English verb conjugation
MUST OVERLABOR

Regular verb: overlabor - overlabored - overlabored

Affirmation

Simple form	V-ing form
I must overlabor you must overlabor she must overlabor we must overlabor you must overlabor they must overlabor	I must be overlaboring you must be overlaboring she must be overlaboring we must be overlaboring you must be overlaboring they must be overlaboring
Perfect	V-ing perfect
I must have overlabored you must have overlabored she must have overlabored we must have overlabored you must have overlabored they must have overlabored	I must have been overlaboring you must have been overlaboring she must have been overlaboring we must have been overlaboring you must have been overlaboring they must have been overlaboring

Negation

Simple form	V-ing form
I mustn't overlabor you mustn't overlabor she mustn't overlabor we mustn't overlabor you mustn't overlabor they mustn't overlabor	I mustn't be overlaboring you mustn't be overlaboring she mustn't be overlaboring we mustn't be overlaboring you mustn't be overlaboring they mustn't be overlaboring
Perfect	V-ing perfect
I mustn't have overlabored you mustn't have overlabored she mustn't have overlabored we mustn't have overlabored you mustn't have overlabored they mustn't have overlabored	I mustn't have been overlaboring you mustn't have been overlaboring she mustn't have been overlaboring we mustn't have been overlaboring you mustn't have been overlaboring they mustn't have been overlaboring

Interrogative form

Simple form	V-ing form
must I overlabor? must you overlabor? must she overlabor? must we overlabor? must you overlabor? must they overlabor?	must I be overlaboring? must you be overlaboring? must she be overlaboring? must we be overlaboring? must you be overlaboring? must they be overlaboring?
Perfect	V-ing perfect
must I have overlabored? must you have overlabored? must she have overlabored? must we have overlabored? must you have overlabored? must they have overlabored?	must I have been overlaboring? must you have been overlaboring? must she have been overlaboring? must we have been overlaboring? must you have been overlaboring? must they have been overlaboring?

Interro-negative form

Simple form	V-ing form
mustn't I overlabor? mustn't you overlabor? mustn't she overlabor? mustn't we overlabor? mustn't you overlabor? mustn't they overlabor?	mustn't I be overlaboring? mustn't you be overlaboring? mustn't she be overlaboring? mustn't we be overlaboring? mustn't you be overlaboring? mustn't they be overlaboring?
Perfect	V-ing perfect
mustn't I have overlabored? mustn't you have overlabored? mustn't she have overlabored? mustn't we have overlabored? mustn't you have overlabored? mustn't they have overlabored?	mustn't I have been overlaboring? mustn't you have been overlaboring? mustn't she have been overlaboring? mustn't we have been overlaboring? mustn't you have been overlaboring? mustn't they have been overlaboring?