There are lots of different forms of abuse. KHL list the four main types of abuse below.
Physical abuse is where somebody hurts your body; it may leave marks or bruises eg. hitting, shaking, shoving, kicking, biting or scratching
Sexual abuse is where somebody gets you involved in sexual activity eg. touching genitals or breasts, showing you pornography or watching you naked see Sexual Abuse
Emotional abuse is hurting you with words or not properly caring for you emotionally eg. name calling, yelling, rejecting, ignoring, criticising or parents fighting in front of you
Neglectful abuse is when you aren’t given the things you need to feel safe and secure eg. not treating you when you’re hurt or sick, not having food to eat or a place to live, leaving you alone for long periods of time Source: https://kidshelpline.com.au/teens/issues/what-is-abuse
Sometimes it can be hard to know what to do to support someone. You may feel stressed or scared you'll say the wrong thing.
Remember your main role in YourCrew is to listen, acknowledge and communicate support. That can mean calling a professional service such as Kids Helpline or, in an emergency, calling 000They can also guide you on what to do.
If you are under 18 years, you can also reach out to an adult or your Crew to help you support someone.