The plural of "a leaf" is "leaves", "a shelf" is "shelves", "a man" is "men", "a child" is "children", "a family" is "families", "a boy" is "boys", "a house" is "houses", "a box" is "boxes", "a bus" is "buses" or "busses", "a dish" is "dishes", "a cherry" is "cherries", and "a mouse" is "mice".