I can amass you can amass he can amass we can amass you can amass they can amass
V-ing form
I can be amassing you can be amassing he can be amassing we can be amassing you can be amassing they can be amassing
Perfect
I can have amassed you can have amassed he can have amassed we can have amassed you can have amassed they can have amassed
V-ing perfect
I can have been amassing you can have been amassing he can have been amassing we can have been amassing you can have been amassing they can have been amassing
Negation
Simple form
I cannot amass you cannot amass he cannot amass we cannot amass you cannot amass they cannot amass
V-ing form
I cannot be amassing you cannot be amassing he cannot be amassing we cannot be amassing you cannot be amassing they cannot be amassing
Perfect
I cannot have amassed you cannot have amassed he cannot have amassed we cannot have amassed you cannot have amassed they cannot have amassed
V-ing perfect
I cannot have been amassing you cannot have been amassing he cannot have been amassing we cannot have been amassing you cannot have been amassing they cannot have been amassing
Interrogative form
Simple form
can I amass? can you amass? can he amass? can we amass? can you amass? can they amass?
V-ing form
can I be amassing? can you be amassing? can he be amassing? can we be amassing? can you be amassing? can they be amassing?
Perfect
can I have amassed? can you have amassed? can he have amassed? can we have amassed? can you have amassed? can they have amassed?
V-ing perfect
can I have been amassing? can you have been amassing? can he have been amassing? can we have been amassing? can you have been amassing? can they have been amassing?
Interro-negative form
Simple form
can I not amass? can you not amass? can he not amass? can we not amass? can you not amass? can they not amass?
V-ing form
can I not be amassing? can you not be amassing? can he not be amassing? can we not be amassing? can you not be amassing? can they not be amassing?
Perfect
can I not have amassed? can you not have amassed? can he not have amassed? can we not have amassed? can you not have amassed? can they not have amassed?
V-ing perfect
can I not have been amassing? can you not have been amassing? can he not have been amassing? can we not have been amassing? can you not have been amassing? can they not have been amassing?