什么是关系从句 (What Are Relative Clauses)

关系从句（Relative Clause）是英语中用来修饰名词或代词的从句，相当于中文里的"……的"结构。掌握关系从句是写出流畅、复杂英语句子的关键一步。很多中国学生知道这些词的存在，但在实际使用中经常混淆。

A relative clause is a clause in English used to modify nouns or pronouns, roughly equivalent to the Chinese structure meaning "...'s" or "...that...". Mastering relative clauses is a key step toward writing fluent, complex English sentences. Many Chinese students know these words exist but frequently confuse them in actual usage.

关系从句分为两大类：限定性（restrictive）和非限定性（non-restrictive）。限定性关系从句提供必要信息，去掉后句子意思不完整；非限定性关系从句提供补充信息，去掉后句子意思仍然完整。这个区别决定了你是否需要用逗号隔开从句。

Relative clauses are divided into two types: restrictive and non-restrictive. Restrictive relative clauses provide essential information — without them, the sentence loses its meaning. Non-restrictive relative clauses provide supplementary information — the sentence remains meaningful without them. This distinction determines whether you need to set the clause off with commas.

五大关系代词详解 (Five Relative Pronouns Explained)

Who 用于指人。例如：The teacher who taught me English retired last year.（教我英语的老师去年退休了。）在非限定性从句中，who 可以指代前面整个句子，如：My boss approved the project, which made me very happy. 这里 which 指代的是"老板批准项目"这件事。

Who is used for people. For example: The teacher who taught me English retired last year. In non-restrictive clauses, "who" can refer to the entire preceding sentence, such as: My boss approved the project, which made me very happy. Here, "which" refers to the fact that the boss approved the project.

Which 用于指物或指代前面整个事件。注意 which 在限定性从句中可以替换为 that，但在非限定性从句中只能用 which，不能用 that。这是一个常考的语法点。

Which is used for things or to refer to the entire preceding event. Note that in restrictive clauses, "which" can be replaced by "that," but in non-restrictive clauses, only "which" can be used, not "that." This is a frequently tested grammar point.

That 是最灵活的关系代词，既可以指人也可以指物，但只能用于限定性从句。在口语中，that 甚至可以省略：The book (that) I read yesterday was fascinating. 但是，that 不能用于非限定性从句，这是很多学习者容易犯错的地方。

That is the most versatile relative pronoun — it can refer to both people and things, but only in restrictive clauses. In spoken English, "that" can even be omitted: The book (that) I read yesterday was fascinating. However, "that" cannot be used in non-restrictive clauses, which is where many learners make mistakes.

Where 用于指地点，相当于 in/at/on which。例如：This is the city where I grew up.（这是我长大的城市。）When 用于指时间，相当于 at/on/in which。例如：I remember the day when we first met.（我记得我们第一次见面的那天。）

Where is used for places, equivalent to "in/at/on which." For example: This is the city where I grew up. When is used for time, equivalent to "at/on/in which." For example: I remember the day when we first met.

常见错误与辨析 (Common Mistakes and Clarifications)

中国学生最常犯的错误是 which 和 that 的混用。记住三条规则：非限定性从句只能用 which；介词后面只能用 which 和 whom（不能用 that）；先行词是 all, everything, nothing 等不定代词时，优先用 that。

The most common mistake Chinese students make is confusing "which" and "that." Remember three rules: non-restrictive clauses can only use "which"; prepositions can only be followed by "which" and "whom" (not "that"); when the antecedent is an indefinite pronoun like "all," "everything," or "nothing," "that" is preferred.

另一个常见错误是在 where 和 which 之间犹豫。判断标准很简单：如果先行词是地点名词，用 where；如果是事物或抽象概念，用 which。例如：The school where I studied is old.（school 是地点）对比 The school which I attended is old.（这里 which 作 attended 的宾语）。

Another common mistake is hesitating between "where" and "which." The rule is simple: if the antecedent is a place noun, use "where"; if it is a thing or abstract concept, use "which." For example: The school where I studied is old. (school is a place) Compare: The school which I attended is old. (here "which" is the object of "attended").

实战练习 (Practice Exercises)

试着用关系从句合并以下句子：1) The woman is my aunt. She is wearing a red dress. → The woman who is wearing a red dress is my aunt. 2) I visited the museum. It was built in 1920. → I visited the museum that was built in 1920. 多做这样的练习，关系从句就会变成本能。

Try combining these sentences with relative clauses: 1) The woman is my aunt. She is wearing a red dress. → The woman who is wearing a red dress is my aunt. 2) I visited the museum. It was built in 1920. → I visited the museum that was built in 1920. Practice like this regularly, and using relative clauses will become second nature.

【重点词汇】

• relative clause /ˈrelətɪv klɔːz/ n. 关系从句 — Relative clauses add detail and complexity to sentences.
• antecedent /ˌæntɪˈsiːdnt/ n. 先行词 — The antecedent is the noun that the relative clause modifies.
• restrictive /rɪˈstrɪktɪv/ adj. 限定性的 — Restrictive clauses provide essential information.
• non-restrictive /nɒn rɪˈstrɪktɪv/ adj. 非限定性的 — Non-restrictive clauses are set off by commas.
• modify /ˈmɒdɪfaɪ/ v. 修饰 — The relative clause modifies the noun "teacher."
• versatile /ˈvɜːrsətl/ adj. 多功能的 — "That" is the most versatile relative pronoun.
• indicate /ˈɪndɪkeɪt/ v. 表明 — Commas indicate a non-restrictive clause.
• equivalent /ɪˈkwɪvələnt/ adj. 等同的 — "Where" is equivalent to "in which."

【语法要点】

• 限定性 vs 非限定性：限定性无逗号，提供必要信息；非限定性有逗号，提供补充信息。
• that vs which：限定性从句两者皆可；非限定性从句只能用 which。
• 关系代词作宾语时可省略：The book (that) I read 读起来更自然。