Go back on
Break a promise
The government have GONE BACK ON their promise not to raise taxes.
Similar phrasal verbs
Go about Go across Go after Go against Go ahead Go ahead with Go along with Go around Go at Go away Go back Go before Go below Go by Go down Go down on Go down to Go down with Go for Go for it Go forth Go forward Go in Go in for Go in with Go into Go it Go it alone Go off Go off with Go on Go on about Go on at Go on to Go on with Go one Go out Go out for Go out to Go out with Go over Go over to Go past Go round Go through Go through with Go to Go together Go towards Go under Go up Go up to Go with Go without