Essential Rules for Subject-Verb Agreement

In the IELTS Grammatical Range and Accuracy (GRA) grading criteria, Subject-Verb Agreement stands as one of the most fundamental pillars. No matter how brilliant your Task 2 ideas might be, or how fluent your Speaking responses sound, systematically and repeatedly making verb agreement errors will become a major obstacle, dragging down your sentence precision and severely capping your GRA band score. As the official IELTS descriptor outlines, persistent grammatical mistakes make it extremely difficult for candidates to break through to higher band levels (Band 7.0+).

The biggest challenge for learners is that subjects in academic English are frequently long, complex noun phrases or tricky pronouns. Brought to you by ECE English, this guide will help you systemize all subject-verb agreement rules through smart, easy-to-remember logic groups, completely eliminate common grammar traps, and provide practice exercises matching the authentic IELTS tone.

1. Subjects That Always Take Singular Verbs

To avoid feeling overwhelmed by dozens of minor rules, you only need to remember that this first group encompasses subjects representing a single cohesive unit, an uncountable concept, or a specific action.

1.1 Gerunds or Noun Clauses as Subjects

When you turn an action or an entire clause into the subject of a sentence, that action is always treated as a single entity.

• Structure: V-ing / To + V-inf / Noun Clause + Singular Verb

Example: Integrating modern CRM software into the education system takes a lot of time and effort. (Việc tích hợp phần mềm CRM hiện đại vào hệ thống giáo dục tốn rất nhiều thời gian và công sức.)

Noun clause example: What the office manager needs to focus on is optimizing the working conditions. (Điều mà người quản lý văn phòng cần tập trung vào là tối ưu hóa điều kiện làm việc.)

1.2 Indefinite Pronouns

Words pointing to an unspecified entity within the every, any, some, no group (such as everyone, everything, somebody, nothing) or distributive words like each, every, either of, neither of, each of always take singular verbs.

Example: Each of the forty employees is required to attend the technical training session. (Mỗi người trong số bốn mươi nhân viên đều được yêu cầu tham gia buổi đào tạo kỹ thuật.)

Example: Everyone in the IELTS library section loves the quiet study environment. (Mọi người ở khu vực thư viện IELTS đều yêu cầu môi trường học tập yên tĩnh.)

1.3 Noun Phrases Denoting Measurement, Time, Distance, or Money

Even though these nouns end in “-s” (such as dollars, kilometers, hours), when they function as a total aggregate quantity, the verb must be singular.

Example: Five kilometers is too long a distance for a daily walk. (Năm cây số là một khoảng cách quá dài cho một chuyến đi bộ hằng ngày.)

Example: Two thousand dollars was spent on upgrading the center’s technical infrastructure last month. (Hai nghìn đô la đã được chi vào việc nâng cấp hạ tầng kỹ thuật của trung tâm vào tháng trước.)

1.4 Special Nouns Ending in “-s” but Singular in Meaning

Names of academic subjects, sports, or diseases naturally contain the letter “s” at the end. You need to memorize these common words: Mathematics, Physics, Economics, Politics, Linguistics, Athletics, Gymnastics, News.

Example: Economics is a core subject for students majoring in office management. (Kinh tế học là môn học cốt lõi đối với sinh viên chuyên ngành quản trị văn phòng.)

2. Subjects That Always Take Plural Verbs

This group represents collectives, clearly plural entities, or irregular nouns.

2.1 Independent Subjects Connected by the Conjunction “and”

When two or more distinct entities are combined, the complete subject becomes plural in nature.

Example: The executive director and his assistant are reviewing the financial budget. (Giám đốc điều hành và trợ lý của ông ấy đang xem xét ngân sách tài chính.)

Exception note: If two nouns are connected by “and” but refer to the same dish or a single conceptual idea, they still take a singular verb (e.g., Fish and chips is my favorite dish).

2.2 Irregular Plural Nouns and Paired Items

Certain nouns referring to groups of people/things do not end in “-s” but are inherently plural: People, Police, Cattle, Children. Additionally, nouns denoting objects consisting of two symmetrical parts always take plural verbs: Glasses, trousers, shorts, shoes, scissors.

Example: The local police are investigating the data breach incident. (Cảnh sát địa phương đang điều tra sự cố rò rỉ dữ liệu.)

Example: These technical glasses protect the webmaster’s eyes from screen strain. (Chiếc kính kỹ thuật này bảo vệ mắt của người quản trị web khỏi bị mỏi do màn hình.)

Quick tip: If paired nouns are preceded by the phrase “A pair of”, the verb must instead agree with the word pair (singular).

2.3 The “The + Adjective” Structure Denoting a Group of People

When the article The precedes an adjective to name a social class or group of people, this structure functions as a plural noun.

Example: The poor in developing nations need direct educational subsidies from governments. (Người nghèo ở các quốc gia đang phát triển cần các khoản trợ cấp giáo dục trực tiếp từ chính phủ.)

3. Subjects Agreeing with the Head Noun (The “OF” Rule)

This is a classic grammar trap in IELTS Reading tests and Task 2 essays. When the subject is a long noun phrase containing the preposition “of”, you need to clearly distinguish between the following two cases:

3.1 Agreement with the Noun Before the Preposition “of”

Applicable to standard complex noun phrases, or phrases denoting structure or quality. The verb completely ignores the nouns following “of” to agree with the core head noun at the front.

Example: The quality of the intensive IELTS courses is the center’s top priority. (Chất lượng của các khóa học IELTS cấp tốc là ưu tiên hàng đầu của trung tâm -> the verb is agrees with the singular quality, not with courses).

Example: The causes of air pollution are often linked to the high volume of private vehicles. (Các nguyên nhân của ô nhiễm không khí thường liên kết với lượng phương tiện cá nhân lớn -> the verb are agrees with the plural causes).

3.2 Agreement with the Noun After the Preposition “of” (Quantifier Rule)

Contrasting with the rule above, if the phrase before “of” consists of quantifiers, percentages, fractions, or determiners such as A lot of, All of, Some of, Most of, Plenty of, % + of, Fraction + of, the verb shifts to agree with the noun following “of”.

Example 1 (Uncountable noun after “of” -> singular): Most of the data online is protected by advanced encryption algorithms. (Hầu hết dữ liệu trực tuyến được bảo vệ bởi các thuật toán mã hóa nâng cao -> singular agreement with data).

Example 2 (Plural noun after “of” -> plural): A lot of content marketers are using topic clusters to improve website rankings. (Rất nhiều nhà tiếp thị nội dung đang sử dụng các cụm chủ đề để cải thiện thứ hạng website -> plural agreement with marketers).

4. Distinguishing Easily Confused Parallel Structures

4.1 “The number of” vs. “A number of”

This is a pair of structures appearing with high density in IELTS Writing Task 1 charts.

• The number of + Plural_Noun + Singular_Verb: Meaning “The quantity of something”, the actual subject is The number, so the verb is always singular.

Example: The number of social media users has increased dramatically over the last few years. (Số lượng người dùng mạng xã hội đã tăng lên đáng kể trong vài năm qua.)

• A number of + Plural_Noun + Plural_Verb: Equivalent in meaning to Many, functioning as a quantifier phrase so the verb is always plural, agreeing with the subsequent noun.

Example: A number of administrative challenges have arisen due to the new curriculum change. (Nhiều thách thức hành chính đã xuất hiện do sự thay đổi chương trình học mới.)

4.2 Agreement with the Nearest Subject (Structures with Or/Nor)

When independent subjects are connected by conjunctions such as or, nor, either…or, neither…nor, the verb ignores distant subjects and agrees exclusively with the subject positioned directly beside it (S_2).

Example 1: Either the office manager or the directors are responsible for evaluating the training quality. (Hoặc người quản lý văn phòng hoặc các giám đốc chịu trách nhiệm đánh giá chất lượng đào tạo -> plural agreement with directors).

Example 2: Neither the employees nor the boss is satisfied with the current stressful working conditions. (Cả nhân viên và sếp đều không hài lòng với điều kiện làm việc căng thẳng hiện tại -> singular agreement with boss).

4.3 Agreement with the First Subject (Intervening Phrase Structures)

When the main subject is modified by intervening phrases connected by as well as, together with, along with, with, accompanied by, everything following the comma is merely supplementary information. The verb must agree with the first subject (S_1).

Example: The headteacher, along with her experienced assistants, is organizing the new IELTS enrollment event. (Hiệu trưởng, cùng với các trợ lý giàu kinh nghiệm của cô ấy, đang tổ chức sự kiện tuyển sinh IELTS mới -> singular agreement with The headteacher).

5. The Nature of Collective Nouns

Nouns denoting an organization or group of people such as government, family, team, staff, committee, audience, council have extremely flexible verb agreement rules depending entirely on the writer’s argumentative intent:

• Case 1 (Treating the organization as a unified whole -> Singular Verb):

Example: The marketing team of ECE is working very hard to launch the new campaign. (Đội ngũ marketing của ECE đang làm việc rất chăm chỉ để triển khai chiến dịch mới.)

• Case 2 (Emphasizing individual, separate actions of members within the group -> Plural Verb):

Example: The staff are discussing different methods to resolve the sitemap indexing dropped errors. (Các nhân viên đang thảo luận về các phương pháp khác nhau để xử lý các lỗi sụt giảm lập chỉ mục sitemap.)

6. Subject-Verb Agreement Practice Exercises

Part 1: Choose the Correct Verb Form in Brackets

1. The quality of these professional essay drafts (is / are) improving day by day.

2. Statistics (has / have) always been a challenging tool for data analysts to master.

3. What the technology startup needs most (is / are) real-time data inputs.

4. Neither the local citizens nor the government (has / have) taken action to clean the river.

5. The number of international students enrolling in top academies (decreases / decrease) every year.

6. A variety of administrative skills (is / are) required for managing a company of forty employees.

7. Ten thousand dollars (was / were) allocated to the office equipment procurement project last quarter.

8. The staff, accompanied by the executive director, (is / are) attending the corporate financial conference.

9. Reading books in the digital library (helps / help) students expand their vocabulary significantly.

10. The police (is / are) monitoring the website to prevent severe data breaches.

Part 2: Find and Correct a Single Error in Each Sentence

11. Studying online with experienced teachers are the best choice for busy people.

12. Either the CEO or the directors is responsible for approving the new marketing strategy.

13. The major reason for the severe crawling drops were related to technical sitemap errors.

14. A number of challenges has arisen in the workplace due to the sudden shift in leadership style.

15. Mathematics are my favorite subject because it improves my logical thinking skills.

16. The family is having different opinions regarding where to spend their summer holiday.

17. The poor in this city needs urgent support from local authorities and non-profit organizations.

18. There is various reasons why implementing a CRM software is essential for modern business.

19. Two hours are the maximum time allowed for candidates to complete the IELTS writing test.

20. Every student and teacher in this language center have to follow the strict dress code.

Part 3: Complete the Sentences Using the Correct Verb Form (is / are / has / have)

21. All of the data stored in the central database ________ been leaked to the public.

22. Implementing topic clusters ________ a highly effective strategy to break through website rankings.

23. The number of website visitors ________ significantly increased after the technical optimization.

24. A pair of professional sports shoes ________ sitting under the office desk.

25. Neither of the proposals submitted by the marketing team ________ satisfactory.

26. Most of the water on earth ________ located in the oceans.

27. The causes of air pollution in metropolitan areas ________ related to transportation.

28. Supposing you ________ given a chance to run this education center, what would you do?

29. To understand the needs of forty different employees ________ a lot of empathy and leadership.

30. The news regarding the adjustment of IELTS entrance requirements ________ shocking to many students.

Part 4: Rewrite Sentences Using Prompts to Ensure Correct Subject-Verb Agreement

31. The manager / as well as / his assistants / work / on the CRM project / at the moment.

-> ________________________________________________________________________

32. A number / technical errors / discovered / in the XML sitemap / yesterday.

-> ________________________________________________________________________

33. Neither / the sếp / nor / the employees / satisfy / with the current working conditions.

-> ________________________________________________________________________

34. Most / the budget / spend / on purchasing / modern office equipment / last month.

-> ________________________________________________________________________

35. The number / students / register / for the IELTS Fast Track course / rise / rapidly / now.

-> ________________________________________________________________________

36. Living / in big cities / require / people / to adapt / to high living costs.

-> ________________________________________________________________________

37. Ten kilometers / be / the distance / between / my house / and the English center.

-> ________________________________________________________________________

38. Either / your glasses / or / my book / be / on the boardroom table / right now.

-> ________________________________________________________________________

39. The committee / reach / a final decision / about the procurement budget / last night.

-> ________________________________________________________________________

40. What / he / want / most / be / to bứt phá / his GRA score / in the next exam.

-> ________________________________________________________________________

7. Exercise Answer Key

Part 1 Answers:

1. is (Agrees with the singular head noun quality before the preposition “of”).

2. has (The academic subject Statistics ends in “-s” but is singular in meaning).

3. is (The noun clause What the technology startup needs most acts as the subject, taking a singular verb).

4. has (Applying the neither…nor structure, the verb agrees with the second subject government which is singular).

5. decreases (The structure The number of requires a third-person singular verb).

6. are (The quantifier phrase A variety of followed by a plural noun takes a plural verb).

7. was (The monetary amount Ten thousand dollars