The noun 'wool' is an uncountablenoun as a word for a substance. Units of wool are expressed as skeins of wool, yards of wool, pounds of wool, etc.
The plural form 'wools' is used for 'types of' or 'kinds of', for example:
"The wools we have available are Shetland and Merino."
The noun 'sheep' is a countable noun but the singular and the plural words are the same.
Example:
The farmer has one black sheep.
The farmer has two white sheep.
An uncountable noun is characterized as having no function (or form) for a plural, or no function (or from) for a singular.
One example is the noun 'oxygen', an uncountable singular noun as a word for a substance. It has no plural form. Quantities of oxygen are expressed as units or amounts, for example a tank of oxygen, two tanks of oxygen. The tanks are counted, not the oxygen.
Another example is the noun 'news', an uncountable plural noun as a type of aggregate noun, a word representing an indefinite number of elements or parts; it has no singular form. Units of news are expressed as the forms in which they are delivered/received, for example a report of news, several reports of news. The reports are counted, not the news.
The sheep can be counted.
Countable nouns
Is wool countable or uncountable
Transport is both countable and uncountable as a noun.
The noun 'steel' is an uncountable (mass) noun, a word for a substance.
Countable
The noun 'animal' is a countable noun. The plural form is animals.
Prawn - prawns is the plural - is a countable noun
Transport is both countable and uncountable as a noun.
The noun 'steel' is an uncountable (mass) noun, a word for a substance.
Shark is a countable noun.
Countable
countable
The noun 'daytime' is an uncountable noun.
The noun 'animal' is a countable noun. The plural form is animals.
Prawn - prawns is the plural - is a countable noun
Countable
Pasta is a countable noun
The word 'violence' is an uncountable noun.
The gerund painting is a countable noun, as in "There are 12 paintings in this room."