问此句中of的用法是什么?
问题描述：
问此句中of的用法是什么?
Charlie and his family often take their boat out in the middle of the lake.
答
of表示所属结构,“湖的..”
in the middle在..中间.
不过,我们一般理解成"in the middle of"是个固定短语,意为“在...的中间”