English verb conjugation
MUST STEAM

Regular verb: steam - steamed - steamed

Affirmation

Simple form	V-ing form
I must steam you must steam he must steam we must steam you must steam they must steam	I must be steaming you must be steaming he 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 he 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 he 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 mustn't steam you mustn't steam he mustn't steam we mustn't steam you mustn't steam they mustn't steam	I mustn't be steaming you mustn't be steaming he mustn't be steaming we mustn't be steaming you mustn't be steaming they mustn't be steaming
Perfect	V-ing perfect
I mustn't have steamed you mustn't have steamed he mustn't have steamed we mustn't have steamed you mustn't have steamed they mustn't have steamed	I mustn't have been steaming you mustn't have been steaming he mustn't have been steaming we mustn't have been steaming you mustn't have been steaming they mustn't have been steaming

Interrogative form

Simple form	V-ing form
must I steam? must you steam? must he steam? must we steam? must you steam? must they steam?	must I be steaming? must you be steaming? must he 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 he 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 he 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
mustn't I steam? mustn't you steam? mustn't he steam? mustn't we steam? mustn't you steam? mustn't they steam?	mustn't I be steaming? mustn't you be steaming? mustn't he be steaming? mustn't we be steaming? mustn't you be steaming? mustn't they be steaming?
Perfect	V-ing perfect
mustn't I have steamed? mustn't you have steamed? mustn't he have steamed? mustn't we have steamed? mustn't you have steamed? mustn't they have steamed?	mustn't I have been steaming? mustn't you have been steaming? mustn't he have been steaming? mustn't we have been steaming? mustn't you have been steaming? mustn't they have been steaming?