Core English Grammar Points and Common Mistakes | 英语语法核心考点与常见易错问题解析

📚 Core English Grammar Points and Common Mistakes | 英语语法核心考点与常见易错问题解析

Mastering English grammar requires more than memorising rules; it requires understanding how structures behave in real sentences. This article focuses on the most frequently tested grammar points in exams and the typical errors learners make.

掌握英语语法不仅需要记忆规则，更需要理解结构在真实句子中的运作方式。本文聚焦考试中最常考的语法要点，以及学习者的典型易错点。

1. Verb Tenses: Present Perfect vs. Simple Past | 动词时态：现在完成时与一般过去时

The present perfect connects a past action to the present moment, while the simple past describes a completed action at a definite time. Many learners confuse these two tenses because their native language may not distinguish them in the same way.

现在完成时把过去的动作与现在联系起来，而一般过去时描述在明确时间点已经完成的动作。许多学习者混淆这两种时态，因为母语可能没有类似的区分。

Key rule: Use the simple past with time markers such as yesterday, last week, in 2010. Use the present perfect with already, yet, just, since, for, ever, never and when the time is not specified.

关键规则： 与 yesterday, last week, in 2010 等时间标记连用时用一般过去时；与 already, yet, just, since, for, ever, never 连用或时间不明确时用现在完成时。

Incorrect: I have seen him yesterday.

错误：I have seen him yesterday.
Correct: I saw him yesterday.

正确：I saw him yesterday.
Incorrect: She has lived here since five years.

错误：She has lived here since five years.
Correct: She has lived here for five years.

正确：She has lived here for five years.

2. Subject-Verb Agreement | 主谓一致

Singular subjects take singular verbs; plural subjects take plural verbs. The most common errors occur when the subject is separated from the verb by a phrase, or when indefinite pronouns are involved.

主语为单数时谓语用单数，主语为复数时谓语用复数。最常见的错误出现在主语与谓语之间插入短语，或者涉及不定代词时。

Incorrect: The number of students are increasing.

错误：The number of students are increasing.

Correct: The number of students is increasing. (the number of is singular)

正确：The number of students is increasing。（the number of 是单数）

Incorrect: Everyone in the class have finished the assignment.

错误：Everyone in the class have finished the assignment.

Correct: Everyone in the class has finished the assignment. (everyone is singular)

正确：Everyone in the class has finished the assignment。（everyone 是单数）

Also remember that either…or and neither…nor follow the subject closest to the verb.

还需注意 either…or 和 neither…nor 遵循就近原则，即谓语与最近的主语一致。

3. Subjunctive Mood | 虚拟语气

The subjunctive is used to express wishes, suggestions, demands, and unreal conditions. It often appears after verbs like suggest, recommend, insist, demand, request.

虚拟语气用于表达愿望、建议、要求和不真实的条件。它常出现在 suggest, recommend, insist, demand, request 等动词之后。

Key pattern: subject + verb (base form) in that-clauses after such verbs.

关键句型：这些动词后的 that 从句中，谓语用动词原形。

Incorrect: I suggest that he studies harder.

错误：I suggest that he studies harder.

Correct: I suggest that he study harder.

正确：I suggest that he study harder。

For unreal conditionals, use the past perfect for the condition and would have + past participle for the result.

在不真实条件句中，if 从句用过去完成时，主句用 would have + 过去分词。

If I had known the truth, I would have told you.

如果当时我知道真相，我就会告诉你。

4. Non-finite Verbs: Infinitive vs. Gerund | 非谓语动词：不定式与动名词

Some verbs are followed by the infinitive, some by the gerund, and some by either with a change in meaning. Common errors come from memorising verbs in isolation rather than in patterns.

有些动词后接不定式，有些后接动名词，还有一些两者皆可但意思不同。常见的错误源于孤立记忆动词，而不是记住搭配模式。

Verb + Gerund	Verb + Infinitive	Change in meaning
enjoy, mind, finish, avoid, practise	want, decide, hope, agree, offer	remember, forget, stop, try

Remember to stop smoking = cease the action; remember to stop to smoke = pause in order to smoke.

remember to stop smoking 指“停止吸烟”；remember to stop to smoke 指“停下来去吸烟”。

Try + gerund means experiment with something; try + infinitive means make an effort.

try + 动名词表示“尝试做某事”；try + 不定式表示“努力做某事”。

5. Relative Clauses: That vs. Which vs. Who | 定语从句：that/which/who 的用法

Relative clauses add information about a noun. Who refers to people, which to things, and that can replace either in restrictive clauses. Which can also introduce non-restrictive clauses, but that cannot.

定语从句为名词补充信息。who 指人，which 指物，that 在限定性定语从句中可代替两者。which 还可引导非限定性定语从句，而 that 不能。

Incorrect: The book who is on the table is mine.

错误：The book who is on the table is mine.

Correct: The book that/which is on the table is mine.

正确：The book that/which is on the table is mine。

Non-restrictive: My brother, who lives in London, is a doctor. (Do not use that for non-restrictive clauses.)

非限定性：My brother, who lives in London, is a doctor.（非限定性从句不用 that。）

Also note that prepositions in relative clauses can appear at the end or before whom/which in formal style.

还需注意，定语从句中的介词可置于句末，或在正式语体中置于 whom/which 之前。

6. Noun Clauses: Order and Conjunctions | 名词性从句：语序和连接词

Noun clauses act as subjects, objects, or complements. The most common mistake is using question word order inside a noun clause.

名词性从句充当主语、宾语或表语。最常见的错误是在名词性从句中使用疑问句语序。

Incorrect: I don’t know where is he.

错误：I don’t know where is he.

Correct: I don’t know where he is.

正确：I don’t know where he is。

When the noun clause is a statement, use that; when it is a question, use if/whether or a question word, but keep the clause in statement order.

如果名词性从句是陈述内容，用 that 引导；如果是疑问内容，用 if/whether 或疑问词引导，但从句内部必须保持陈述语序。

Correct: Whether she will come is uncertain.

正确：Whether she will come is uncertain。

7. Adverbial Clauses: Common Connectors | 状语从句常见连接词

Adverbial clauses express time, reason, condition, contrast, purpose, and result. Choosing the wrong connector can change or break the sentence’s logic.

状语从句表达时间、原因、条件、对比、目的和结果。选错连接词会改变甚至破坏句子的逻辑。

Time: when, while, before, after, until, as soon as

时间：when, while, before, after, until, as soon as
Reason: because, since, as

原因：because, since, as
Condition: if, unless, provided that

条件：if, unless, provided that
Contrast: although, even though, while

对比：although, even though, while
Purpose: so that, in order that

目的：so that, in order that
Result: so…that, such…that

结果：so…that, such…that

Incorrect: Although it was raining, but he went out.

错误：Although it was raining, but he went out.

Correct: Although it was raining, he went out.

正确：Although it was raining, he went out。

In English, do not combine although with but in the same clause.

英语中 although 不能与 but 在同一句子中连用。

8. Inversion: Never, Seldom, Rarely | 倒装：否定副词位于句首

Inversion puts the auxiliary verb before the subject. It is required after certain negative or restrictive adverbs at the beginning of a sentence.

倒装是指将助动词置于主语之前。某些否定副词或限制性副词置于句首时，句子必须使用倒装。

Incorrect: Never I have seen such a beautiful sunset.

错误：Never I have seen such a beautiful sunset.

Correct: Never have I seen such a beautiful sunset.

正确：Never have I seen such a beautiful sunset。

Other expressions that trigger inversion: seldom, rarely, hardly…when, no sooner…than, not only…but also.

其他引起倒装的表达包括：seldom, rarely, hardly…when, no sooner…than, not only…but also。

No sooner had he arrived than the phone rang.

他一到电话就响了。

9. Emphatic Structure: It is…that… | 强调句：It is…that…

The cleft sentence It is/was…that emphasises a single part of a sentence. It is often tested in rewriting exercises.

强调句型 It is/was…that 用于强调句子中的某一成分，常在改写题中出现。

Original: I met John at the station yesterday.

原句：我昨天在车站遇见了约翰。

Emphasise the object: It was John that I met at the station yesterday.

强调宾语：我昨天在车站遇见的是约翰。

Emphasise the place: It was at the station that I met John yesterday.

强调地点：我昨天遇见约翰是在车站。

When emphasising a person, who can replace that; when emphasising time, use that, not when.

强调人时，可用 who 代替 that；强调时间时，仍用 that，不能用 when。

10. Modal Verbs: Degrees of Certainty | 情态动词：肯定程度

Modal verbs express ability, permission, obligation, and probability. They are followed by the bare infinitive, and they do not change form for the third person singular.

情态动词表达能力、许可、义务和可能性。情态动词后接动词原形，并且第三人称单数不变形。

Incorrect: She can sings well.

错误：She can sings well.

Correct: She can sing well.

正确：She can sing well。

For degrees of certainty about past events, use must have, might have, can’t have + past participle.

表达对过去事件的肯定程度，用 must have, might have, can’t have + 过去分词。

The lights are off. They must have left.

灯关了。他们肯定已经离开了。

She can’t have finished the whole book in one day.

她不可能一天之内读完整本书。

11. Articles and Countability | 冠词与可数性

Articles depend on whether a noun is countable, uncountable, definite, or indefinite. Common errors involve omitting a/an, adding the where it is not needed, or using a/an with uncountable nouns.

冠词取决于名词是可数、不可数、定指还是不定指。常见错误包括漏掉 a/an、在不必要的地方加 the，或把 a/an 用于不可数名词。

Incorrect: I have good news for you.

错误：I have good news for you. (缺少冠词)

Correct: I have a piece of good news for you. Or: I have good news for you. (if news is treated as uncountable)

正确：I have a piece of good news for you. 或 I have good news for you.（news 是不可数名词）

Incorrect: He gave me an advice.

错误：He gave me an advice.

Correct: He gave me a piece of advice.

正确：He gave me a piece of advice。

Remember that abstract nouns like information, advice, homework, furniture are uncountable in English.

注意 information, advice, homework, furniture 等在英语中是不可数名词。

12. Prepositions and Collocations | 介词与固定搭配

Prepositions are highly idiomatic. Errors often occur with time, place, and after certain adjectives or verbs.

介词极具习惯性。错误常发生在时间、地点表达以及某些形容词或动词之后的搭配中。

Incorrect: She is married with a doctor.

错误：She is married with a doctor.
Correct: She is married to a doctor.

正确：She is married to a doctor。
Incorrect: I am good in maths.

错误：I am good in maths.
Correct: I am good at maths.

正确：I am good at maths。
Incorrect: We arrived to the airport at noon.

错误：We arrived to the airport at noon.
Correct: We arrived at the airport at noon.

正确：We arrived at the airport at noon。

Memorising fixed collocations such as depend on, listen to, proud of, interested in will reduce these errors significantly.

牢记固定搭配，如 depend on, listen to, proud of, interested in，可以显著减少这类错误。

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Core English Grammar Points and Common Mistakes | 英语语法核心考点与常见易错问题解析