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 must not sham you must not sham he must not sham we must not sham you must not sham they must not sham	I must not be shamming you must not be shamming he must not be shamming we must not be shamming you must not be shamming they must not be shamming
Perfect	V-ing perfect
I must not have shammed you must not have shammed he must not have shammed we must not have shammed you must not have shammed they must not have shammed	I must not have been shamming you must not have been shamming he must not have been shamming we must not have been shamming you must not have been shamming they must not 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
must I not sham? must you not sham? must he not sham? must we not sham? must you not sham? must they not sham?	must I not be shamming? must you not be shamming? must he not be shamming? must we not be shamming? must you not be shamming? must they not be shamming?
Perfect	V-ing perfect
must I not have shammed? must you not have shammed? must he not have shammed? must we not have shammed? must you not have shammed? must they not have shammed?	must I not have been shamming? must you not have been shamming? must he not have been shamming? must we not have been shamming? must you not have been shamming? must they not have been shamming?