"She always going on ..."

[Odessa Dawn]

always = very often As well as all the time or on every occasion, always can also mean very often when it is used with the progressive form:
She always going on about the cost of living and how expensive everything is.
I'm always losing my keys. I put them down and can never remember where I've put them.
More: BBC World Service | Learning English | Learn it

PROGRESSIVE TENSES

Is "She always going on about the cost of living" syntactically acceptable without verb to be (is)?

Thank you,

[emsr2d2]

Unless that was reported speech, it's an error and should be "She's ..." or "She is ..."

[probus]

If reported speech it would probably be Jamaican dialect.