Get on – off are used for a bus, plane, ship or train. (Originally, from "on board" or "aboard" a wooden ship, on now refers to all public or mass transportation: on a bus, on a ship, on a plane, on a ferry.) The expression CANNOT be separated by an object or object pronoun. | Get in - out of are used for enclosed, private transportation. On - off are used for other modes such as bikes and motorcycles. The expression CANNOT be separated by an object or object pronoun. |
Get on the elevator. (Br. Eng – lift) | Get off the elevator. | Get in the elevator. (enclosed – usage varies) | Get out of of the elevator. |