in the grass 与on the grass的区别

问题描述:

in the grass 与on the grass的区别

in the grass在草丛中
on the grass在草地上当in 与on都表示在……上时,怎么区分?如果只是在表面上面就用on。 There is a picture on the wall.墙上有幅画。如果是嵌入进内部了,就用in。There is a hole in the wall.墙上有个洞。