it that one ones those substitute for the difference of things

that: substitute words in comparison sentences, uncountable nouns that substitute.

If the substitution is itself, it is singular and they are plural.

Refers to animals, objects, and can be used directly in sentences.

It is hers they are theirs, etc., which are placed in the sentence immediately after the previous sentence as the subject.

3.Sometimes universal: that it is greatest!

and ones refer to the items that have already been said earlier, and are placed in the sentence immediately after the previous sentence as an object use. one refers to the singular and ones refers to the plural.

One refers to each in general or refers to the preceding sentence in the singular form.

ones (after those + noun plural).

girls in this class are beautiful, those ones are the hottest!

one (specifically refers to, followed by a definite clause).

It's a bit much, I'm looking for ** for you.

One it this that are both pronouns, but they are used differently.

1. One refers to one of the same kind of things mentioned above, but not the one mentioned above, i.e., "different things of the same kind". If you refer to some of the same kind of things, use ones.

This apple is small, please give me a big one.

2).these books are mine. those ones are lily's.

These books are mine, those books are Lily's.

2. IT replaces the things mentioned above.

Such as: 1). my bike is very old,but i like it very much.

My bike is old, but I love it.

2).where is my new pen? i can't find it.

Where's my new fountain pen? I can't find it anymore.

3. That in comparison, replace uncountable nouns, such as weather, population, etc.; Its plural those replaces the plural of countable nouns; When used as demonstrative pronouns, they generally refer to things that are far away.

Such as: 1).the population of china is larger than that of amreica .(that instead of population).

China's population is larger than that of the United States.

2). the students in class 1 are better at english than those in class 2.(those instead of students).

The students in the first class are better at English than the students in the second class.

3).that is a bike.

It was a bike. (at a distance).

4. This is a demonstrative pronoun, which generally refers to something close and cannot replace the previous thing.

For example: this is a computer

It's a computer. (in the near distance).