<human>: How do I get my car to start when it's been sitting a long time?
<bot>: The first step in getting your car to start when it has been sitting for a while is to check the battery. Make sure that it is properly charged and that the cables are securely connected. If the battery is still good, then try turning the engine over with a starter motor or by using an external power source like a jump-start. You may also need to check other components such as spark plugs, fuel system, and air filter. Once you have checked everything, if the problem persists, take the vehicle to a qualified mechanic for further diagnosis.