warn -> предупреждать
Образование времен: Субъект подвергается (Пассив, или иначе страдательный залог)
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Факт - Simple
I/he/she/itwe/you/they
was warnedwere warned
---
was not warnedwere not warned
wasn't warnedweren't warned
Ihe/she/itwe/you/they
am warnedis warnedare warned
---
am not warnedis not warnedare not warned
 isn't warnedare'nt warned
I/he/she/it/we/you/they
will be warned
---
will not be warned
won't be warned
Процесс - Continuous
I/he/she/itwe/you/they
was being warnedwere being warned
---
was not being warnedwere not being warned
wasn't being warnedweren't being warned
Ihe/she/itwe/you/they
am being warnedis being warnedare being warned
---
am not being warnedis not being warnedare not being warned
 isn't being warnedare'nt being warned
Завершенность - Perfect
I/he/she/it/we/you/they
had been warned
---
had not been warned
hadn't been warned
I/we/you/theyhe/she/it
have warnedhas warned
---
have not warnedhas not warned
haven't warnedhasn't warned
I/he/she/it/we/you/they
will have been warned
---
will not have been warned
won't have been warned
Вместо отсутствующих форм Perfect Continuous употребляются формы Perfect
warn -> предупреждать