YOU SAID:

They both get angrier.

INTO JAPANESE

彼らは両方を得る怒り。

BACK INTO ENGLISH

They both get angry;

INTO JAPANESE

彼らの両方は怒る。

BACK INTO ENGLISH

Both of them get mad.

INTO JAPANESE

それらの両方は怒る。

BACK INTO ENGLISH

Both of them are angry.

INTO JAPANESE

それらの両方は、怒っています。

BACK INTO ENGLISH

Both of them are angry.