1. go back on
I hope he doesn't go back on his promise
I promise to never go back on a promise. Retract, fail to complete. My boss went back on his promise so I was not promoted.
2. come back on
3. get back onto
4. get back on
5. be back at
I'll be back at work
英語 "という言葉wrócić na"(be back at)集合で発生します。
Phrasal verbs