English verb conjugation
MUST DATESTAMP

Regular verb: datestamp - datestamped - datestamped

Affirmation

Simple form	V-ing form
I must datestamp you must datestamp she must datestamp we must datestamp you must datestamp they must datestamp	I must be datestamping you must be datestamping she must be datestamping we must be datestamping you must be datestamping they must be datestamping
Perfect	V-ing perfect
I must have datestamped you must have datestamped she must have datestamped we must have datestamped you must have datestamped they must have datestamped	I must have been datestamping you must have been datestamping she must have been datestamping we must have been datestamping you must have been datestamping they must have been datestamping

Negation

Simple form	V-ing form
I must not datestamp you must not datestamp she must not datestamp we must not datestamp you must not datestamp they must not datestamp	I must not be datestamping you must not be datestamping she must not be datestamping we must not be datestamping you must not be datestamping they must not be datestamping
Perfect	V-ing perfect
I must not have datestamped you must not have datestamped she must not have datestamped we must not have datestamped you must not have datestamped they must not have datestamped	I must not have been datestamping you must not have been datestamping she must not have been datestamping we must not have been datestamping you must not have been datestamping they must not have been datestamping

Interrogative form

Simple form	V-ing form
must I datestamp? must you datestamp? must she datestamp? must we datestamp? must you datestamp? must they datestamp?	must I be datestamping? must you be datestamping? must she be datestamping? must we be datestamping? must you be datestamping? must they be datestamping?
Perfect	V-ing perfect
must I have datestamped? must you have datestamped? must she have datestamped? must we have datestamped? must you have datestamped? must they have datestamped?	must I have been datestamping? must you have been datestamping? must she have been datestamping? must we have been datestamping? must you have been datestamping? must they have been datestamping?

Interro-negative form

Simple form	V-ing form
must I not datestamp? must you not datestamp? must she not datestamp? must we not datestamp? must you not datestamp? must they not datestamp?	must I not be datestamping? must you not be datestamping? must she not be datestamping? must we not be datestamping? must you not be datestamping? must they not be datestamping?
Perfect	V-ing perfect
must I not have datestamped? must you not have datestamped? must she not have datestamped? must we not have datestamped? must you not have datestamped? must they not have datestamped?	must I not have been datestamping? must you not have been datestamping? must she not have been datestamping? must we not have been datestamping? must you not have been datestamping? must they not have been datestamping?