English verb conjugation
MUST AMASS

Regular verb: amass - amassed - amassed

Affirmation

Simple form	V-ing form
I must amass you must amass he must amass we must amass you must amass they must amass	I must be amassing you must be amassing he must be amassing we must be amassing you must be amassing they must be amassing
Perfect	V-ing perfect
I must have amassed you must have amassed he must have amassed we must have amassed you must have amassed they must have amassed	I must have been amassing you must have been amassing he must have been amassing we must have been amassing you must have been amassing they must have been amassing

Negation

Simple form	V-ing form
I must not amass you must not amass he must not amass we must not amass you must not amass they must not amass	I must not be amassing you must not be amassing he must not be amassing we must not be amassing you must not be amassing they must not be amassing
Perfect	V-ing perfect
I must not have amassed you must not have amassed he must not have amassed we must not have amassed you must not have amassed they must not have amassed	I must not have been amassing you must not have been amassing he must not have been amassing we must not have been amassing you must not have been amassing they must not have been amassing

Interrogative form

Simple form	V-ing form
must I amass? must you amass? must he amass? must we amass? must you amass? must they amass?	must I be amassing? must you be amassing? must he be amassing? must we be amassing? must you be amassing? must they be amassing?
Perfect	V-ing perfect
must I have amassed? must you have amassed? must he have amassed? must we have amassed? must you have amassed? must they have amassed?	must I have been amassing? must you have been amassing? must he have been amassing? must we have been amassing? must you have been amassing? must they have been amassing?

Interro-negative form

Simple form	V-ing form
must I not amass? must you not amass? must he not amass? must we not amass? must you not amass? must they not amass?	must I not be amassing? must you not be amassing? must he not be amassing? must we not be amassing? must you not be amassing? must they not be amassing?
Perfect	V-ing perfect
must I not have amassed? must you not have amassed? must he not have amassed? must we not have amassed? must you not have amassed? must they not have amassed?	must I not have been amassing? must you not have been amassing? must he not have been amassing? must we not have been amassing? must you not have been amassing? must they not have been amassing?