英语里,在左边和在右边必须用on,如:on the right.
在top和corner前面用on、in、at都可以:on表示紧贴顶、角.例如:on the top of the hill there's a tower.on the corner of the street there's a shop.
in 表示在角、顶里面,例如,in the top of the tree there's a kite.in the corner of the river there's a boat.
at 表示在外围附近 如,at the street corner there's a bus stop ,at the hill top there're lots of flowers.
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