YOU SAID:

A broken clock is right twice a day

INTO JAPANESE

壊れた時計が正しい日に二回

BACK INTO ENGLISH

A broken clock is correct, 2 times.

INTO JAPANESE

2 回は壊れた時計が正しいです。

BACK INTO ENGLISH

Broken clock is right twice.

INTO JAPANESE

壊れた時計が正しい 2 回。

BACK INTO ENGLISH

Broken clocks are right twice.

INTO JAPANESE

壊れた時計が正しい 2 回。

BACK INTO ENGLISH

Broken clocks are right twice.