breaking one's back

Verb

form-of participle present

present participle of break one's back

Japanese Meaning

これは『break one's back』の現在分詞、すなわち動詞の活用形（現在分詞形）を示しています。

Nobody deserves credit for breaking one's back for someone who never appreciates it.

感謝しない人のために身を粉にして働く価値はない。

Sense（1）

present participle of break one's back