Partitive Structure with Uncountable Nouns
To count or quantify an uncountable noun we use a unit of measurement - a measure word.
For example, we cannot usually say “two breads” because “bread” is
uncountable. So, if we want to specify a quantity of bread we use a
measure word such as “loaf” or “slice” in a structure like “two loaves
of bread” or “two slices of bread”. We call this