IELTS Grammar Explained: Master Subject–Verb Agreement

Achieving a 7+ band score in IELTS Writing and Speaking often depends on mastering important IELTS grammar rules. A frequent mistake preventing many students from exceeding a 6.5 band is the misuse of the third-person singular rule. 

IELTS Grammar explained guide addresses common, real IELTS-level grammatical errors, focusing on accurate application of subject-verb agreement even under exam pressure.

IELTS Grammar - Third-Person Singular Rule

Understanding the third-person singular rule is essential for avoiding basic grammar mistakes in IELTS Writing and Speaking. Even a small error, such as missing -s or -es in the simple present tense, can affect your grammatical accuracy score. Learning this rule and applying it correctly helps ensure that your sentences follow proper subject-verb agreement.

• Rule: When the subject is a singular third-person noun or pronoun (e.g., he, she, it, the government, technology), the verb must have an -s or -es ending.

• Example: He plays football. Technology affects communication.

• When the subject is plural (e.g., they, we, students) or a first/second person pronoun (I, you), the base form of the verb is used without an -s/-es.

• Example: They play football.

The real issue in IELTS is not a lack of knowledge of this basic rule, but wrong subject identification. In complex, IELTS-style sentences, students often mistakenly match the verb to a nearby plural noun, rather than the true, often singular, subject of the sentence. The verb must agree with the subject, not with nearby nouns.

IELTS Grammar - Correct Identification of the Subject

To avoid errors, you must be able to isolate the true subject in a sentence, especially when it is long or complex. The key is to identify and mentally ignore prepositional phrases. A prepositional phrase begins with a preposition (like in, of, with, for, among, across) and contains a noun. This phrase provides extra information but is never the subject of the sentence.

To find the true subject in a long sentence:

The Magic Rule for Subject Identification: Look at the word(s) that come *before the preposition.*) The verb must agree with that subject, not with the noun inside the prepositional phrase.

Example Application:

• Sentence: The government [in many countries] encourages recycling.

• Analysis:

• The preposition is "in."

• The phrase "[in many countries]" is the prepositional phrase. Ignore it for subject-verb agreement.

• The true subject is "The government" (singular).

• Therefore, the verb must be "encourages" (singular).

Special Cases: Subjects That Appear Plural

Some subject structures in English look plural but actually function as singular subjects. These patterns often confuse IELTS test-takers and lead to subject-verb agreement errors. Understanding these commonly used phrases can help you apply the correct verb form and improve grammatical accuracy in academic writing.

IELTS Grammar - "The number of" vs. "A number of"

The phrases “the number of” and “a number of” are frequently used in academic English and IELTS essays, but they follow different subject-verb agreement rules. Many students use the wrong verb form because both phrases are followed by plural nouns. Learning the difference ensures that your sentences remain grammatically correct in formal writing.

Important Tips for IELTS Grammar

Improving grammar for IELTS 2026 does not always require complex rules; often, it involves avoiding small but frequent mistakes. The most common and critical grammar errors in IELTS Writing often come down to a single missing 's'. These small errors can prevent you from achieving a band score of 7 or higher.

To master subject-verb agreement in complex sentences:

1. Identify the prepositions (of, in, with, among, etc.).

2. Ignore the nouns that come after the preposition.

3. Find the true subject that comes before the preposition.

4. Make the verb agree with that subject.

Focus on identifying the true subject to significantly improve your grammatical accuracy.

Practice Questions for IELTS Grammar

Practice is essential to apply grammar rules accurately in exam conditions. Solving subject-verb agreement questions helps you identify common errors, reinforce the rules, and build confidence for the IELTS Writing and Speaking sections.

Part A: Multiple Choice Questions

1. Sentence: The growing use of social media platforms _ a significant impact on young people's behavior.

• Correct Answer: (d) has

• Explanation: The true subject is "The growing use" (singular), not "platforms" (plural). The verb must agree with the singular subject.

2. Sentence: Each employee in the organization _ responsible for meeting deadlines.

• Correct Answer: (a) is

• Explanation: The word "Each" makes the subject singular.

3. Sentence: The number of private vehicles on the road(s) _ dramatically in recent years.

• Correct Answer: (d) has increased

• Explanation: The subject is "The number" (singular), not "vehicles" or "roads."

4. Sentence: Economic growth in developing nations often _ on foreign investment.

• Correct Answer: (b) depends

• Explanation: The subject is "Economic growth" (singular), not "nations" (plural).

Part B: Spot the Error

1. Sentence: The government play an important role.

• Error: play

• Correction: The government plays an important role.

2. Sentence: Technology affects communication.

• Status: Correct.

3. Sentence: Every individual have the right to voice their concerns.

• Error: have

• Correction: Every individual has the right… (The word "Every" makes the subject singular).

4. Sentence: The research highlights some limitations.

• Status: Correct.

5. Sentence: The government in many countries encourage recycling of plastic.

• Error: encourage

• Correction: The government in many countries encourages… (The subject is "government," not "countries").