A man who was put on a good behaviour bond for trying to throw his underage girlfriend in front of an oncoming train has been jailed after he breached the conditions of his release.

Key points: Lucas Narkle pleaded guilty to endangering his underage girlfriend's life in 2017

Lucas Narkle pleaded guilty to endangering his underage girlfriend's life in 2017 He avoided jail last year and was placed on a good behaviour bond

He avoided jail last year and was placed on a good behaviour bond He was resentenced on Friday to four months in prison after breaching the bond

Lucas Gary Narkle, 21, pleaded guilty to endangering his girlfriend's life over the incident which happened on the platform of the Elizabeth train station in October 2017.

The District Court heard Narkle's girlfriend was 14 years old at the time and that the couple had a child together.

In August last year, Judge Simon Stretton placed Narkle on a bond to be of good behaviour for three years.

However, Judge Liesl Chapman has resentenced Narkle to four months in prison after hearing he had breached the bond by failing to show up for community service and by testing positive to cannabis and methamphetamine on multiple occasions.

"You were given an opportunity by Judge Stretton to get yourself together, that is to rehabilitate," she said.

"You have not taken that opportunity, you have used drugs, you've not got the professional help that you needed in relation to the grief and loss and you failed to turn up for supervision and community service as directed."

'Must have been very frightening'

The incident at the train station was captured on CCTV and tendered to the court as evidence.

Narkle can be seen restraining his girlfriend before trying to pull her in front of an oncoming train.

"The community simply does not tolerate violence against women," Judge Chapman said.

"The paramount consideration in sentencing you is the protection and the safety of the community, including women from violence by their partners.

"It must have been very frightening for her to be dragged toward a moving train like that."

The court heard Narkle had been using methamphetamine prior to the incident and was struggling to cope with the death of his mother.

"Your grief and mental health at the time might well explain what you did, but it does not excuse it," Judge Chapman said.

"You simply cannot take out your anger at the world on your partner."

Narkle thanked Judge Chapman as he was escorted into custody.