know -> знать
Образование времен: Субъект подвергается (Пассив, или иначе страдательный залог)
  Past - ПрошлоеPresent - НастоящееFuture - Будущее
Факт - Simple
I/he/she/itwe/you/they
was knownwere known
---
was not knownwere not known
wasn't knownweren't known
Ihe/she/itwe/you/they
am knownis knownare known
---
am not knownis not knownare not known
 isn't knownare'nt known
I/he/she/it/we/you/they
will be known
---
will not be known
won't be known
Процесс - Continuous
I/he/she/itwe/you/they
was being knownwere being known
---
was not being knownwere not being known
wasn't being knownweren't being known
Ihe/she/itwe/you/they
am being knownis being knownare being known
---
am not being knownis not being knownare not being known
 isn't being knownare'nt being known
Завершенность - Perfect
I/he/she/it/we/you/they
had been known
---
had not been known
hadn't been known
I/we/you/theyhe/she/it
have knownhas known
---
have not knownhas not known
haven't knownhasn't known
I/he/she/it/we/you/they
will have been known
---
will not have been known
won't have been known
Вместо отсутствующих форм Perfect Continuous употребляются формы Perfect
know -> знать