English verb conjugation
MUST SHAM

Regular verb: sham - shammed - shammed

Affirmation

Simple form	V-ing form
I must sham you must sham he must sham we must sham you must sham they must sham	I must be shamming you must be shamming he must be shamming we must be shamming you must be shamming they must be shamming
Perfect	V-ing perfect
I must have shammed you must have shammed he must have shammed we must have shammed you must have shammed they must have shammed	I must have been shamming you must have been shamming he must have been shamming we must have been shamming you must have been shamming they must have been shamming

Negation

Simple form	V-ing form
I mustn't sham you mustn't sham he mustn't sham we mustn't sham you mustn't sham they mustn't sham	I mustn't be shamming you mustn't be shamming he mustn't be shamming we mustn't be shamming you mustn't be shamming they mustn't be shamming
Perfect	V-ing perfect
I mustn't have shammed you mustn't have shammed he mustn't have shammed we mustn't have shammed you mustn't have shammed they mustn't have shammed	I mustn't have been shamming you mustn't have been shamming he mustn't have been shamming we mustn't have been shamming you mustn't have been shamming they mustn't have been shamming

Interrogative form

Simple form	V-ing form
must I sham? must you sham? must he sham? must we sham? must you sham? must they sham?	must I be shamming? must you be shamming? must he be shamming? must we be shamming? must you be shamming? must they be shamming?
Perfect	V-ing perfect
must I have shammed? must you have shammed? must he have shammed? must we have shammed? must you have shammed? must they have shammed?	must I have been shamming? must you have been shamming? must he have been shamming? must we have been shamming? must you have been shamming? must they have been shamming?

Interro-negative form

Simple form	V-ing form
mustn't I sham? mustn't you sham? mustn't he sham? mustn't we sham? mustn't you sham? mustn't they sham?	mustn't I be shamming? mustn't you be shamming? mustn't he be shamming? mustn't we be shamming? mustn't you be shamming? mustn't they be shamming?
Perfect	V-ing perfect
mustn't I have shammed? mustn't you have shammed? mustn't he have shammed? mustn't we have shammed? mustn't you have shammed? mustn't they have shammed?	mustn't I have been shamming? mustn't you have been shamming? mustn't he have been shamming? mustn't we have been shamming? mustn't you have been shamming? mustn't they have been shamming?