Grammar fix
go back on
not do something you promised or agreed to do
to break a promise or agreement; to decide not to do something you said you would do.
phrasal verbB2common
Hear it in context
Notice where the phrase sounds natural.
He promised to help me move, but then he went back on his word at the last minute.
In my opinion, it's important not to go back on your promises, especially when working in a team.
Fix the pattern
One small grammar move makes it sound right.
Not: Don't go back your promise.
Say: Don't go back on your promise.
Needs 'on' — 'go back ON a promise / your word / the deal'.
Which sounds natural?
Tap the one a native speaker would say.
'Go back on (your word/promise)' is the idiomatic phrase. 'Failed to honour his commitment' is formal/legal.
Build natural chunks
Words that usually travel with it.
go back on + commitment
- your word
- a promise
- the deal
- an agreement