YOU SAID:

Not how they should behave

INTO JAPANESE

彼らの動作をしません。

BACK INTO ENGLISH

They might not work.

INTO JAPANESE

彼らは動作しない可能性があります。

BACK INTO ENGLISH

They do not work.

INTO JAPANESE

- そんな事ない

BACK INTO ENGLISH

- No, he hasn't.

INTO JAPANESE

- そんな事ない

BACK INTO ENGLISH

- No, he hasn't.