How to determine which part of a sentence is the main clause? Which part is the clause? Please give me an example. You need to use the syntax of master-slave appearance.

The so-called "subject and subordinate present" refers to the requirements for the tense of the predicate verb in some special adverbial clauses. Such clauses include time adverbials, conditional adverbials, concession adverbials and place adverbials. In other words, the scope of application of "master and subordinate present" is conditional. In this case, how to determine which part of the main clause is the main clause and which part is the subordinate clause starts with this type of sentence.

1. Adverbials about time, condition, concession and place

Adverbials are the "grammatical" components that describe the "state" present when the predicate verb of a sentence occurs, referred to as "adverbials" , indicating that the time state is a time adverbial, the conditional state is a conditional adverbial, the concession state is a concession adverbial, and the place state is a place adverbial, such as:

* He will come tomorrow. He will come tomorrow.

——The word "tomorrow" in the sentence indicates the time state when "come" occurs.

* He will come with his brother. He will come with his brother.

——The "with his brother" in the sentence explains the inter-conditional state when "come" occurs.

* He will not come, though. That being said, he will not come.

——The adverb though in the sentence explains the state of concession when come occurs.

* He will come from there. He will come from there.

——The "from there" in the sentence indicates the location when "come" occurs.

2. About adverbial clauses

Adverbial clauses refer to using sentences as adverbials. The examples cited above all belong to simple adverbials. If the adverbials are replaced by a sentence with a subject-predicate structure, an adverbial clause will be formed. Such as:

* He will come when he is free. He will come tomorrow when he is not busy.

Main clause: He will come

Subordinate clause: when he is free

* He will come if his brother wants to go with him. If his brother wants to go with him. and walk together. He will come.

Main clause: He will come

Subordinate clause: if his brother wants to go with him.

* He will come though he is busy. Although he is very busy. If you are busy, he will come.

Main clause: He will come

Subordinate clause: though he is busy

* He will be welcomed where he comes to. He will be welcomed wherever he comes to. .

Main clause: He will be welcomed

Subordinate clause: where he comes to.

3. More examples of "the master will appear"

As mentioned at the beginning, "subject will present" is limited to expressing the future in subject-subordinate complex sentences containing adverbial clauses of time, condition, concession or place.

* I'll call you as soon as I get there.

——Time adverbial

* After he has arrived, he will go sightseeing around the city. After he arrives, he will go sightseeing around the city. ——Time adverbial

* If they have time, they will help us with our work. If they have time, they will help us with our work. ——Conditional adverbial

* Unless he studies hard, he will never pass the examination. ——Conditional adverbial

* I'll call to see you this evening though I can stay only a few minutes. ——Adverbial of concession

* No matter where she may be, she will be happy. No matter where she is, she will be happy. ——Adverbial of concession

* He will make friends wherever he goes. ——Adverbials of place

4. It can be seen from the above that any clause is composed of simple grammatical components expanded into sentences. In addition to the above-mentioned adverbial clauses, the same is true for other clauses. A simple example is as follows:

Object——

* He found (the lost car). He found the lost car. ——Noun as object

* He found (that his car was lost). He found that his car was lost. ——Sentence as object

Attributive——

* His car (lost yesterdat) has been found. The car he lost yesterday has been found. ——The past participle is used as a postpositional attributive

* His car (which was lost yesterdat) has been found. The car he lost yesterday has been found. ——Clause as attributive

Adverbial of purpose——

* He came (to visit me). He came to visit me. ——The infinitive is used as an adverbial.

* He came (in order that he could see me). In order to see me, he came. ——The clause is used as an adverbial.

Such as this, clauses are formed in this way. Understand this principle, it is not difficult to identify which is the main clause and which is the subordinate clause.