indicating that a noun involved in a construction refers only to a part or fraction of what it otherwise refers to. The phrase some of the butter is a partitive construction;
这表明在一个结构中所涉及的名词仅指其原本所指事物的一部分或一小部分。短语“一些黄油”就是一个划分性的结构;
In 'a spoonful of sugar', the word 'spoonful' is a partitive.
在a spoonful of sugar中,spoonful一词是表量词。