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 mustn't amass you mustn't amass he mustn't amass we mustn't amass you mustn't amass they mustn't amass	I mustn't be amassing you mustn't be amassing he mustn't be amassing we mustn't be amassing you mustn't be amassing they mustn't be amassing
Perfect	V-ing perfect
I mustn't have amassed you mustn't have amassed he mustn't have amassed we mustn't have amassed you mustn't have amassed they mustn't have amassed	I mustn't have been amassing you mustn't have been amassing he mustn't have been amassing we mustn't have been amassing you mustn't have been amassing they mustn't 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
mustn't I amass? mustn't you amass? mustn't he amass? mustn't we amass? mustn't you amass? mustn't they amass?	mustn't I be amassing? mustn't you be amassing? mustn't he be amassing? mustn't we be amassing? mustn't you be amassing? mustn't they be amassing?
Perfect	V-ing perfect
mustn't I have amassed? mustn't you have amassed? mustn't he have amassed? mustn't we have amassed? mustn't you have amassed? mustn't they have amassed?	mustn't I have been amassing? mustn't you have been amassing? mustn't he have been amassing? mustn't we have been amassing? mustn't you have been amassing? mustn't they have been amassing?