When it comes to roll paper, paper is uncountable. If you express countability, you must use unit words. A piece of paper is a piece? Paper; Is "a large standard size paper" a piece? Paper.

When paper is interpreted as "written paper", it is a countable noun in plural form. Paper can also be interpreted as newspapers, documents, certificates, examination papers and papers, and can be used in the plural. If it is used as a document, it can be counted; if it represents a paper, it cannot be counted.

countable

There are singular and plural forms. When referring to a person or a thing, use the singular form; Use the plural when referring to two or more people or things. The rules for changing nouns from singular form to plural form are as follows:

The regular change of countable noun plural;

1, and directly add -s to the suffix of general nouns, such as:

Book → library → pear room → pear

House → House Day → Tiange → Song

2. Nouns ending in s, x, ch and sh, with -es at the end. For example:

Bus → Bus Box → Box

Watch → watch plate → plate

Baidu encyclopedia-countable nouns