What are the plural forms of that and this?

That plural form: this, this plural form: those.

First of all, that

1, which means pron. that Conj。 Guiding clause; As mentioned above. I like it very much; So ...

Step 2 use

That as a demonstrative pronoun means "that, that". It can refer to the thing mentioned above, to something or people farther away from another thing in space or time, to things and ideas to be shown or mentioned.

When that is used as a relative pronoun, it refers to a person or thing, and at the same time acts as a sentence component in a clause. Occasionally, you can guide non-restrictive attributive clauses.

I walked to the gate leading to the lake.

I walked to the gate by the lake.

Second, this

1, which means pron. This; This. This. In this way; So ...

Step 2 use

When this is used as an adjective to explain "this", it is used to modify things or people closer to the speaker in time, place and concept, and can also be used with words including the present day or period of time.

"this+own+n." is a concise and focused style; "This+primitive+time noun" means a period of time. This can be used with the phrase of, followed by a noun possessive pronoun or a noun possessive case.

There are many mosquitoes in this dark and humid place.

Extended data:

Synonym: who, which. Adjacent word: rider.

I. Who

1, which means pron. Who is it? World Health Organization.

For example, 2

Who do you think you are?

Second, which one?

1, meaning: adj. Which one; Which ones? Which pronoun; Which ones?

For example, 2

It's hard to say which is better.

Third, no matter which one.