YOU SAID:

bit off more than he/she can chew

INTO JAPANESE

彼/彼女が噛むことができる以上に噛み切れる

BACK INTO ENGLISH

Bite more than he / she can bite

INTO JAPANESE

彼/彼女が噛むことができるよりも一口

BACK INTO ENGLISH

A bite than he / she can bite

INTO JAPANESE

彼/彼女は噛むことができるよりも一口

BACK INTO ENGLISH

A bite than he / she can bite