Where does this plural come from?

1. Where does the plural come from?
2. Why is the plural of this?
3. What is it in plural form?

Where does the plural come from?

The Origin of the Plural S

The simplest and most popular explanation, though, is that it was basically already there, in the form of the language's archaic inflections. Old English was a highly inflected language, which means it often added endings to flag the grammatical functions of words.

Why is the plural of this?

This, that, these and those are demonstratives. We use this, that, these and those to point to people and things. This and that are singular. These and those are plural.

What is it in plural form?

“It” is a neuter pronoun that takes the place of a noun The plurals of “it” are: Subjective - “they” Objective - “them” Possessive - “their” Helpful(1)