YOU SAID:

Tell my brother to due

INTO JAPANESE

弟に期限を教えて

BACK INTO ENGLISH

Tell my brother the deadline.

INTO JAPANESE

弟に締め切りを伝えてください。

BACK INTO ENGLISH

Please tell your brother the deadline.

INTO JAPANESE

お兄さんに締め切りを教えてください。

BACK INTO ENGLISH

Please tell your brother the deadline.