初中英语中什么是定语

定语是用来修饰名词或代词的词、短语或从句，它对名词或代词进行描述、限定或指明特指。在初中英语中，定语可以是形容词、名词、代词、数词、副词或介词短语等。例如，在句子“The red book is mine”中，“red”就是定语，修饰名词“book”。

Attributives play a crucial role in English grammar by modifying and limiting nouns or pronouns. They are words, phrases, or clauses that describe or specify the noun or pronoun they precede, often indicated by the structure "...'s" in Chinese. Adjectives are the primary constituents of attributives, but other parts of speech such as nouns, pronouns, numerals, participles, adverbs, infinitives, and prepositional phrases can also serve as attributives. Additionally, a sentence can function as an attributive. When a single word acts as an attributive, it is placed before the word it modifies, known as a pre-attributive. Conversely, phrases and clauses that act as attributives are positioned after the word they modify, known as post-attributives.

Attributive Clauses

Within complex sentences, clauses that modify nouns or pronouns are referred to as attributive clauses. The noun or pronoun being modified by the attributive clause is called the antecedent. The words that introduce attributive clauses are known as relative words, which are divided into relative pronouns and relative adverbs. Attributive clauses are typically placed after the antecedent. In English, relative pronouns include who, whom, whose, which, that, and as. Relative adverbs include when, where, and why. These words function as adverbials within the attributive clause and are generally indispensable.

Determining Relative Pronouns and Adverbs

The choice between a relative pronoun and an adverb depends on the transitive verb in the clause. If the transitive verb lacks an object, a relative pronoun is required.

Incorrect: This is the mountain village where I visited last year.

Correct: This is the mountain village (which) I visited last year.

Incorrect: I will never forget the days when I spent in the countryside.

Correct: I'll never forget the days (which) I spent in the countryside.

It is customary to associate nouns indicating places or times with the relative adverbs where and when. The mistakes in these examples lie in the misuse of relative words.

Accurately identifying the role of the antecedent within the attributive clause (as subject, predicate, object, attribute, or adverbial) can also help in correctly selecting a relative pronoun or adverb. If the antecedent functions as a subject, object, or attribute in the clause, a relative pronoun should be chosen; if it functions as an adverbial, a relative adverb should be selected.

Correct: Is this the museum which you visited a few days ago?

Correct: Is this the museum where the exhibition was held?