case grammar
(linguistics 语言) type of transformationalgrammar in which the case relationships are used to describe the deep structure of sentences 格的语法(转换语法的一种类型, 以格的关系来描述句子的深层结构).
but one day, after heavy shower, I happened to be walking in my garden when I noticed a huge number of snails taking a stroll on some of my prize plants.