Grammar errors have a quiet way of undermining otherwise confident writing. A misplaced verb, a wrong preposition, or a missing article can change the meaning of a sentence — or make it sound awkward even when the content is strong.
Error correction in English grammar is one of the most tested skills in Indian school exams (CBSE, ICSE), competitive exams (SSC, IBPS, CAT), and university entrance tests. And yet, most students approach it without any real system. They read a sentence, feel something is “off,” and guess. That approach works sometimes. It fails often.
This guide builds a proper system. You will learn how to classify errors, apply the right rule, and move from guessing to knowing.
Table of Contents
Why Error Correction Matters Beyond Exams
Spotting errors is not just an exam skill. It reflects how well you understand how English sentences are built — and why they work the way they do.
A student who can identify a subject-verb agreement error understands that each, everyone, neither, and similar words are grammatically singular. That knowledge carries directly into writing, speaking, and reading comprehension.
Error correction is diagnostic. It reveals exactly where your grammar knowledge has a gap. Fix the gap, and you fix the error — in exams and everywhere else.
The Seven Main Types of Grammatical Errors
Before you can correct errors, you need to know what categories of errors exist. Most mistakes in English fall into one of these seven types.
| Error Type | What It Means | Quick Signal |
|---|---|---|
| Subject-Verb Agreement | Verb does not match subject in number | Singular noun + plural verb (or reverse) |
| Tense | Wrong tense used for the time context | Time words mismatched with verb form |
| Article | Wrong article (a/an/the) or missing one | Singular countable noun without an article |
| Preposition | Wrong preposition or missing one | “different from” used as “different than” |
| Pronoun | Wrong pronoun form or pronoun-antecedent mismatch | “Each student should submit their” (mismatch) |
| Degree of Adjective/Adverb | Wrong comparative or superlative form | “more better,” “most unique” |
| Word Order / Structure | Sentence parts in wrong position | Misplaced modifier, inverted clause |
A Step-by-Step Method to Correct Any Sentence
This method works for both exam error-spotting questions and for editing your own writing.
Step 1: Read the full sentence once for meaning. Do not stop at the first word that looks wrong. Read the whole sentence and understand what it is trying to say.
Step 2: Identify the subject and the main verb. Subject-verb agreement errors are the most common. Always establish who or what is doing the action, then check if the verb matches.
Step 3: Check the tense against the time context. Look for time markers — yesterday, since, for three years, by tomorrow — and verify the tense is appropriate.
Step 4: Check articles before singular countable nouns. If a singular countable noun has no article before it, there is almost certainly an error.
Step 5: Check prepositions and pronouns. These are often wrong in ways that feel subtle. Trust your rule knowledge here more than your instinct.
Step 6: Check for comparison and degree errors. Phrases like “more superior”, “most unique”, or “India’s population is more than China” are classic exam traps.
Step 7: Re-read the corrected sentence. After making a change, read the whole sentence again. Sometimes fixing one error reveals another.
Type-by-Type Rules with Examples
Subject-Verb Agreement Errors
The rule sounds simple: singular subjects take singular verbs; plural subjects take plural verbs. The difficulty comes when the subject is not obvious.
Rule 1: These words are always singular: each, every, either, neither, anyone, everyone, someone, nobody, one of
| Incorrect | Correct | Why |
|---|---|---|
| Each of the students have submitted the work. | Each of the students has submitted the work. | Each is singular. |
| Neither of the answers are correct. | Neither of the answers is correct. | Neither is singular. |
| One of my friends have moved abroad. | One of my friends has moved abroad. | One is singular. |
Rule 2: Collective nouns take singular verbs when acting as a unit.
The committee has reached a decision. (The committee acts as one body.) The jury were divided in their opinions. (Members acting individually — plural is acceptable here.)
Rule 3: “A number of” is plural. “The number of” is singular.
A number of students were absent. (many students — plural) The number of students is decreasing. (the total figure — singular).
Read More about Subject-verb Agreement: Subject-Verb Agreement: 20 Advanced Rules
Tense Errors
Rule 1: Use the Past Perfect for an action completed before another past action.
| Incorrect | Correct |
|---|---|
| When she arrived, I finished my work. | When she arrived, I had finished my work. |
| He died before the doctor came. | He had died before the doctor came. |
Rule 2: “Since” is used with the Present Perfect or Past Perfect — not Simple Past.
Incorrect: She lived here since 2010. Correct: She has lived here since 2010.
Rule 3: Stative verbs do not usually appear in continuous forms.
Incorrect: I am knowing the answer. Correct: I know the answer.
Common stative verbs: know, believe, understand, see, hear, belong, seem, prefer, contain.
Read the Tenses in details : The 12 Tenses in English Grammar
Article Errors
Rule 1: Use “a” before consonant sounds, “an” before vowel sounds — based on pronunciation, not spelling.
Incorrect: She is a honest woman. Correct: She is an honest woman. (H is silent; it opens with a vowel sound.)
Incorrect: He went to an university. Correct: He went to a university. (“University” opens with a /j/ sound.)
Rule 2: Do not use an article with uncountable nouns in general statements.
Incorrect: The advice she gave was a useful advice. Correct: The advice she gave was useful advice. (Advice is uncountable.)
Rule 3: Use “the” with superlatives.
Incorrect: She is best player in the team. Correct: She is the best player in the team.
Preposition Errors
These are heavily tested in SSC CGL, IBPS PO, and school board exams.
| Incorrect | Correct | Rule |
|---|---|---|
| He is angry on me. | He is angry with me. | Angry with a person |
| She died from cancer. | She died of cancer. | Die of an illness |
| He is different than his brother. | He is different from his brother. | Different from — standard usage |
| India’s population is more than China. | India’s population is more than that of China. | Compare equal things |
| He is blind from one eye. | He is blind in one eye. | Body parts take in |
The last example in the table above is one of the most commonly missed traps in competitive exams. Students know the other rules but forget that comparisons must match the same category. You cannot compare India’s population with the country China — you compare population with population.
Pronoun Errors
Rule 1: A pronoun must agree with its antecedent in number and gender.
Incorrect: Every student should bring their book. Correct: Every student should bring his or her book. (Every is singular.)
Rule 2: Use “who” for persons, “which” for things, “that” for both.
Incorrect: The man which called you is my uncle. Correct: The man who called you is my uncle.
Rule 3: Use “whom” when the pronoun is the object of a verb or preposition.
Incorrect: Who did you speak to? Correct (formal): Whom did you speak to?
Degree of Adjective/Adverb Errors
Rule 1: Never use double comparatives or superlatives.
Incorrect: She is more smarter than her sister. Correct: She is smarter than her sister.
Rule 2: Use “other” or “else” when comparing something to its own group.
Incorrect: Mumbai is bigger than any city in India. Correct: Mumbai is bigger than any other city in India. (Mumbai is itself in India — you must exclude it from the comparison.)
Incorrect: She works harder than everyone in the class. Correct: She works harder than everyone else in the class.
Rule 3: “Unique,” “perfect,” “round,” “complete,” and “absolute” cannot be compared.
Incorrect: This is the most unique painting I have seen. Correct: This is a unique painting. (Unique means one of a kind — it cannot be “more unique.”)
Common Error Correction Traps in Exams
These are the patterns that appear most frequently in CBSE, SSC, IBPS, and competitive entrance tests — and the ones students miss most often.
Trap 1: “No sooner…than” vs “Hardly…when”
Incorrect: No sooner did she arrive than the phone rang. This is actually correct. Students often second-guess it.
Incorrect: Hardly had she arrived than the phone rang. Correct: Hardly had she arrived when the phone rang.
Trap 2: “Between” vs “Among”
Between is for two things or people. Among is for three or more.
Incorrect: Distribute the chocolates between the five students. Correct: Distribute the chocolates among the five students.
Trap 3: “Lay” vs “Lie”
Lay means to put something down (transitive — needs an object). Lie means to recline (intransitive — no object needed).
Incorrect: She laid on the bed all afternoon. Correct: She lay on the bed all afternoon. (Past tense of lie)
Trap 4: “Elder” vs “Older”
Elder is used only for family members. Older is for general comparison.
Incorrect: He is elder than me in the office. Correct: He is older than me in the office.
Read More in details about the Vocabularies: 100 Modern C1 Vocabulary Words You Should Use Every Day
Practice Exercises with Answers and Explanations
Find and correct the error in each sentence. Answers follow below.
Exercise Set A
- The committee have not yet taken a decision on the matter.
- She has been living here since five years.
- He is one of those players who has never missed a match.
- Neither the manager nor the employees was present at the meeting.
- She is more taller than her elder sister.
- Each of the boys have to submit their assignment by Friday.
- Mumbai has a larger population than any city in India.
- He died from a heart attack at the age of sixty.
Answers and Explanations
- The committee has not yet taken a decision on the matter. The committee acts as a single unit here — singular verb.
- She has been living here for five years. Since is used with a point in time (since 2019). For is used with a duration (for five years).
- He is one of those players who have never missed a match. The relative clause relates to “those players” (plural), not to “one” — so the verb is plural.
- Neither the manager nor the employees were present. With “neither…nor,” the verb agrees with the noun closest to it. “Employees” is plural, so use “were.”
- She is taller than her older sister. Double comparative error (more taller). Also, elder is for family members, so older is correct — but note that “elder sister” is acceptable in Indian English as an established usage; more taller is always wrong.
- Each of the boys has to submit his assignment by Friday. Each is singular. The pronoun must also be singular.
- Mumbai has a larger population than any other city in India. Mumbai is itself a city in India. You must exclude it from the comparison with other.
- He died of a heart attack. Die of is used for diseases and medical causes. Die from is used for external causes like accidents.
Teaching Insight: What Actually Fixes This Skill
Most students try to improve error correction by doing more exercises. That helps, but only up to a point.
The deeper fix is rule-anchored reading. When you read, do not just absorb meaning. Notice the structures. When you read a sentence with each or neither, consciously notice the verb that follows. When you see a comparison, check if both sides of the comparison match.
This is called active reading, and it is how grammar internalises itself. You stop applying rules consciously because the patterns become automatic.
A practical method: keep a small error log. Every time you make or spot an error — in exercises, in your own writing, in exam papers — write it down. Note the type, the wrong form, and the correction. Review it weekly. Within a month, patterns in your own errors become visible, and you fix exactly what needs fixing.
For exam purposes, three areas give the highest return on practice time: subject-verb agreement, tense, and prepositions. These appear in almost every error correction question set across CBSE, SSC, IBPS, and university entrance exams.
External Source Suggestions
- Cambridge Dictionary — Grammar — dictionary.cambridge.org/grammar — reliable rule references for prepositions, articles, and tense
- Purdue OWL (Online Writing Lab) — owl.purdue.edu — comprehensive grammar guides including subject-verb agreement and pronoun usage
- British Council LearnEnglish Grammar — https://www.britishcouncil.in/english — exercises and clear explanations ideal for secondary and tertiary learners
Frequently Asked Questions
What is error correction in English grammar?
Error correction is the process of identifying and fixing grammatical mistakes in English sentences. Errors can involve tense, subject-verb agreement, articles, prepositions, pronouns, or degrees of comparison. In exams, it appears as “spot the error,” “sentence correction,” or “rewrite correctly” tasks. It tests both your knowledge of grammar rules and your ability to apply them quickly.
How many types of grammatical errors are there in English?
Broadly, grammatical errors fall into seven main categories: subject-verb agreement, tense, articles, prepositions, pronouns, degrees of adjective or adverb, and sentence structure or word order. Within each category there are multiple specific rules. For exam preparation, mastering subject-verb agreement, tense, and prepositions will cover the majority of questions you encounter.
What is the most common grammar error in English for Indian students?
Based on documented patterns in Indian school and competitive exam contexts, subject-verb agreement errors and preposition errors are the most common. Indian students frequently write “each of them have” instead of “each of them has,” and “different than” instead of “different from.” Tense confusion, particularly with the past perfect and present perfect, is also very frequent.
How do I correct sentences in error correction exercises?
Read the full sentence once for meaning. Then identify the subject and main verb and check agreement. Check the tense against any time words. Look for article errors before singular countable nouns. Then check prepositions and pronouns. Finally, look for degree errors in comparatives and superlatives. Reread the corrected sentence to make sure it works as a whole.
What is the difference between “since” and “for” in English grammar?
“Since” is used with a specific point in time: “She has lived here since 2015.” “For” is used with a duration: “She has lived here for eight years.” A very common error is using “since” with a duration — “since five years” is wrong. Both words are used with the present perfect or past perfect tense, not the simple past.
What does “no error” mean in error detection questions?
Some error detection questions include a “no error” option, meaning the sentence is already grammatically correct. Research on competitive exam patterns suggests that “no error” is the correct answer roughly 15 to 20 percent of the time. Students often feel compelled to find an error even when none exists. If the sentence follows all grammar rules correctly, choose “no error” confidently.
How can I improve my error correction skills quickly?
Three things work best: (1) Study the rules for each error type, especially subject-verb agreement, tense, and prepositions. (2) Do timed practice with explained answers — always read the explanation, not just the correct option. (3) Keep a personal error log of every mistake you make in practice. Reviewing your own errors weekly reveals specific pattern weaknesses and fixes them much faster than random practice.
Is error correction different for CBSE, SSC, and IBPS exams?
The core grammar rules tested are the same across exams. The format differs. CBSE error correction usually presents a sentence with underlined or labelled parts and asks which part has an error. SSC CGL and IBPS PO may present four options and ask you to choose the correct version of the sentence. The rules for tense, agreement, prepositions, and articles apply equally in all formats.
