English verb conjugation
MUST CRAM

Regular verb: cram - crammed - crammed

Affirmation

Simple form	V-ing form
I must cram you must cram she must cram we must cram you must cram they must cram	I must be cramming you must be cramming she must be cramming we must be cramming you must be cramming they must be cramming
Perfect	V-ing perfect
I must have crammed you must have crammed she must have crammed we must have crammed you must have crammed they must have crammed	I must have been cramming you must have been cramming she must have been cramming we must have been cramming you must have been cramming they must have been cramming

Negation

Simple form	V-ing form
I must not cram you must not cram she must not cram we must not cram you must not cram they must not cram	I must not be cramming you must not be cramming she must not be cramming we must not be cramming you must not be cramming they must not be cramming
Perfect	V-ing perfect
I must not have crammed you must not have crammed she must not have crammed we must not have crammed you must not have crammed they must not have crammed	I must not have been cramming you must not have been cramming she must not have been cramming we must not have been cramming you must not have been cramming they must not have been cramming

Interrogative form

Simple form	V-ing form
must I cram? must you cram? must she cram? must we cram? must you cram? must they cram?	must I be cramming? must you be cramming? must she be cramming? must we be cramming? must you be cramming? must they be cramming?
Perfect	V-ing perfect
must I have crammed? must you have crammed? must she have crammed? must we have crammed? must you have crammed? must they have crammed?	must I have been cramming? must you have been cramming? must she have been cramming? must we have been cramming? must you have been cramming? must they have been cramming?

Interro-negative form

Simple form	V-ing form
must I not cram? must you not cram? must she not cram? must we not cram? must you not cram? must they not cram?	must I not be cramming? must you not be cramming? must she not be cramming? must we not be cramming? must you not be cramming? must they not be cramming?
Perfect	V-ing perfect
must I not have crammed? must you not have crammed? must she not have crammed? must we not have crammed? must you not have crammed? must they not have crammed?	must I not have been cramming? must you not have been cramming? must she not have been cramming? must we not have been cramming? must you not have been cramming? must they not have been cramming?