In grammar, the demonstrative pronouns are a type of pronouns used to point out specific entities. In the English language, the four demonstrative pronouns are this, that, these and those. Additionally, each of these is used in different cases and to refer to different nouns or entities. In the case of the pronouns "this" and "that" are always singular which means they refer to singular nouns. On the other hand, "these" and "those" are always plural and therefore refer to plural nouns. Besides, those and these refer to entities that are more distant and that and this refer to entities that are closer to the reader. Considering this, it is false the de pronouns this and that are sometimes singular and sometimes plural because they are always singular.
