English grammar: A house made of stone is longer than a house made of wood.

Here, it is a pronoun part of speech, corresponding to the subject "house". Especially the wooden house. If it is replaced by a house, it is a generic term, and a table refers to it. "that" is a common word in English. It has four parts of speech, which are summarized as follows:

First of all, those are used as adjectives (when followed by plural nouns).

Used of people or things that have been mentioned; Can also be compared, referring to the farther of the two.

What about the book you borrowed from me last month?

Please note that sentences sometimes have emotional colors such as like or despise.

His little son, his little baby son.

That George! That George! (with a contemptuous tone)

Second, that is used as a pronoun.

1.that is used as a demonstrative pronoun (plural form is "those"), which has the same referential meaning as adjectives and can also be used as a antecedent in attributive clauses; In order to avoid repetition, it can also replace the nouns mentioned above.

That is what he told me.

What's that in your hand?

The price of rice is higher than flour.

That is used as a relative pronoun to guide restrictive attributive clauses. Precedent is human and tangible, and its usage is equivalent to who or which. (but that is often used in the following situations: when the antecedent has both people and things; When the antecedent is modified by adjectives superlative, ordinal, indefinite pronouns, extraordinary, only, etc. When the antecedent is indefinite pronouns)

He talked about the teachers and schools he visited.

I think this is one of the most wonderful films produced by the film company.

She has little information that is useful for our research.

What can I do for you?

Please note that that can usually be omitted when it is used as an object in an attributive clause.

The book I sent you will be helpful to your study.

Third, that is used as a conjunction to guide noun clauses, adverbial clauses and stressed sentences.

1. That noun clause.

① Guide the object clause. The leading word after the transitive verb can be omitted.

I didn't expect him to win the championship.

The teacher pointed out that Tom didn't study hard enough.

② Guide the subject clause. Sentence patterns that usually use it as the formal subject.

It is well known that the earth moves around the sun.

As we all know, the earth moves around the sun. )

③ Guide predicative clauses.

The problem is that we are short of money.

④ Guide appositive clauses.

It is different to guide appositive clauses and attributive clauses. The former only plays a grammatical role and does not constitute any component in the clause; The latter is used as subject, object or predicative in attributive clauses. For example:

The news of his resignation surprised us.

His ideas are very common now (reprinted from the first model website, please keep this mark. S on campus.

This leads to adverbial clauses.

(1) guide the adverbial clause of purpose.

Bring it closer so that I can see it more clearly.

(2) Adverbial clauses that lead to results.

What did I do to make him so angry with me?

③ Adverbial clause of guiding reason.

I'm afraid I will fail in the driving test.

(4) Guiding adverbial clauses. It means "though, though".

Although the task was difficult, they managed to finish it on time.

⑤ Guiding conditional adverbial clauses. It means "if, suppose".

Suppose you were in my position, what would you do?

If you get lost in the desert, you should ask for help as soon as possible.

3. Guide the stressed sentences.

It is Mrs. White who makes the decision at home, not her docile little husband.

What is not good for anyone is bad wind.

Fourth, that is used as an adverb.

1. That is used as a common adverb.

I was so angry that I almost hit him

Used as a relative adverb. Leading attributive clauses can replace when, where, why or in which, and they can often be omitted.

I will never forget the night when we went to the theatre.

The house where I used to live has been pulled down.

Fifth, the common important phrases related to this.

1. There it is, meaning "since, because".

Criticism and self-criticism are necessary because they help us correct our mistakes.

It means "since, because".

Now that they have mastered the initiative, things have accelerated.

See (to it) means "pay attention, be sure to do it, guarantee".

We will make sure that she comes home early.

Be careful not to be late again.

Seeing that means "in view of, because".

Since it's already 8 o'clock, we won't wait any longer.

Seeing that he was busy with his work, I didn't bother him.

The above is an overview of the main usage of that, hoping to help everyone. Of course, there are other uses that we need to accumulate and summarize in the process of learning.