English verb conjugation
MUST JOINT

Regular verb: joint - jointed - jointed

Affirmation

Simple form	V-ing form
I must joint you must joint she must joint we must joint you must joint they must joint	I must be jointing you must be jointing she must be jointing we must be jointing you must be jointing they must be jointing
Perfect	V-ing perfect
I must have jointed you must have jointed she must have jointed we must have jointed you must have jointed they must have jointed	I must have been jointing you must have been jointing she must have been jointing we must have been jointing you must have been jointing they must have been jointing

Negation

Simple form	V-ing form
I mustn't joint you mustn't joint she mustn't joint we mustn't joint you mustn't joint they mustn't joint	I mustn't be jointing you mustn't be jointing she mustn't be jointing we mustn't be jointing you mustn't be jointing they mustn't be jointing
Perfect	V-ing perfect
I mustn't have jointed you mustn't have jointed she mustn't have jointed we mustn't have jointed you mustn't have jointed they mustn't have jointed	I mustn't have been jointing you mustn't have been jointing she mustn't have been jointing we mustn't have been jointing you mustn't have been jointing they mustn't have been jointing

Interrogative form

Simple form	V-ing form
must I joint? must you joint? must she joint? must we joint? must you joint? must they joint?	must I be jointing? must you be jointing? must she be jointing? must we be jointing? must you be jointing? must they be jointing?
Perfect	V-ing perfect
must I have jointed? must you have jointed? must she have jointed? must we have jointed? must you have jointed? must they have jointed?	must I have been jointing? must you have been jointing? must she have been jointing? must we have been jointing? must you have been jointing? must they have been jointing?

Interro-negative form

Simple form	V-ing form
mustn't I joint? mustn't you joint? mustn't she joint? mustn't we joint? mustn't you joint? mustn't they joint?	mustn't I be jointing? mustn't you be jointing? mustn't she be jointing? mustn't we be jointing? mustn't you be jointing? mustn't they be jointing?
Perfect	V-ing perfect
mustn't I have jointed? mustn't you have jointed? mustn't she have jointed? mustn't we have jointed? mustn't you have jointed? mustn't they have jointed?	mustn't I have been jointing? mustn't you have been jointing? mustn't she have been jointing? mustn't we have been jointing? mustn't you have been jointing? mustn't they have been jointing?