English verb conjugation
MUST STEAM

Regular verb: steam - steamed - steamed

Affirmation

Simple form	V-ing form
I must steam you must steam she must steam we must steam you must steam they must steam	I must be steaming you must be steaming she must be steaming we must be steaming you must be steaming they must be steaming
Perfect	V-ing perfect
I must have steamed you must have steamed she must have steamed we must have steamed you must have steamed they must have steamed	I must have been steaming you must have been steaming she must have been steaming we must have been steaming you must have been steaming they must have been steaming

Negation

Simple form	V-ing form
I must not steam you must not steam she must not steam we must not steam you must not steam they must not steam	I must not be steaming you must not be steaming she must not be steaming we must not be steaming you must not be steaming they must not be steaming
Perfect	V-ing perfect
I must not have steamed you must not have steamed she must not have steamed we must not have steamed you must not have steamed they must not have steamed	I must not have been steaming you must not have been steaming she must not have been steaming we must not have been steaming you must not have been steaming they must not have been steaming

Interrogative form

Simple form	V-ing form
must I steam? must you steam? must she steam? must we steam? must you steam? must they steam?	must I be steaming? must you be steaming? must she be steaming? must we be steaming? must you be steaming? must they be steaming?
Perfect	V-ing perfect
must I have steamed? must you have steamed? must she have steamed? must we have steamed? must you have steamed? must they have steamed?	must I have been steaming? must you have been steaming? must she have been steaming? must we have been steaming? must you have been steaming? must they have been steaming?

Interro-negative form

Simple form	V-ing form
must I not steam? must you not steam? must she not steam? must we not steam? must you not steam? must they not steam?	must I not be steaming? must you not be steaming? must she not be steaming? must we not be steaming? must you not be steaming? must they not be steaming?
Perfect	V-ing perfect
must I not have steamed? must you not have steamed? must she not have steamed? must we not have steamed? must you not have steamed? must they not have steamed?	must I not have been steaming? must you not have been steaming? must she not have been steaming? must we not have been steaming? must you not have been steaming? must they not have been steaming?