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March 9, 2025
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Grammar errors can significantly impact your IELTS score, preventing you from achieving your target band and potentially delaying your academic or immigration plans. At Highbrow IELTS Institute, we’ve helped thousands of students identify and correct these common pitfalls. This comprehensive guide outlines the most frequent grammar mistakes candidates make and provides practical solutions to help you avoid them in your next IELTS exam.
Subject-Verb Agreement Errors
Subject-verb agreement is a fundamental grammatical principle that requires the subject and verb in a sentence to match in number. This seemingly simple rule trips up many IELTS candidates, especially when dealing with complex subjects or intervening phrases.
Common mistakes:
– “The number of students *have* increased.” (Incorrect)
– “The data *shows* different results.” (Is “data” singular or plural?)
– “Each of the participants *were* asked to complete a survey.” (Incorrect)
Correct versions:
– “The number of students *has* increased.” (“Number” is singular)
– “The data *show* different results.” (In academic English, “data” is typically treated as plural)
– “Each of the participants *was* asked to complete a survey.” (“Each” is singular)
IELTS Impact: Examiners are trained to identify subject-verb agreement errors quickly. These mistakes suggest a lack of grammatical awareness and can lower your score in the Grammatical Range and Accuracy criterion, particularly when aiming for bands 7+.
Highbrow IELTS Tip: When writing or speaking, mentally identify the main subject and ensure your verb matches. Our specialized Subject-Verb Agreement workshops help students master this essential skill through focused exercises and real-time feedback.
Tense Consistency Issues
Maintaining consistent tenses throughout your writing and speaking is crucial for clarity. Many candidates inadvertently shift between past, present, and future tenses without logical reason.
Common mistakes:
– “Last year, I visited Paris and *am enjoying* the architecture.” (Tense shift)
– “The graph shows that sales *increased* in 2020 and then *will rise* again in 2021.” (Illogical tense shift)
– “When I arrived at the university, I *register* for my classes.” (Incorrect tense)
Correct versions:
– “Last year, I visited Paris and *enjoyed* the architecture.”
– “The graph shows that sales increased in 2020 and then *rose* again in 2021.” (Past tense for historical data)
– “When I arrived at the university, I *registered* for my classes.”
IELTS Impact: Inconsistent tenses confuse the reader/listener and suggest poor language control. This directly affects both the Coherence and Cohesion and Grammatical Range and Accuracy criteria.
Highbrow IELTS Tip: Before submitting your writing task, review specifically for tense consistency. Our “Tense Master” course helps students create a mental timeline to organize their thoughts logically across different time frames.
Article Misuse (a, an, the)
The English article system is notoriously difficult for non-native speakers, especially those whose first languages don’t have articles. Articles might seem minor, but they significantly impact precision and natural flow.
Common mistakes:
– “I want to buy *a* furniture for my new apartment.” (Uncountable noun)
– “*The* people should care more about environment.” (Overgeneralization)
– “She gave me *an* useful advice about my career.” (Incorrect article with consonant sound)
Correct versions:
– “I want to buy *some* furniture for my new apartment.”
– “*People* should care more about *the* environment.”
– “She gave me *a* useful advice about my career.” (Words starting with ‘u’ often have a consonant ‘y’ sound)
IELTS Impact: Article errors are particularly noticeable in writing tasks and can make otherwise good writing seem unpolished. Consistent article errors typically cap scores around Band 6.5 for Grammatical Accuracy.
Highbrow IELTS Tip: Learn article rules systematically rather than through memorization. Our specialized Article Mastery program focuses on understanding the logic behind article usage through practical exercises and real-world examples.
Preposition Errors
Prepositions (in, on, at, by, with, etc.) often follow different patterns in different languages, making them challenging for IELTS candidates.
Common mistakes:
– “I’m interested *about* environmental science.” (Wrong preposition)
– “The increase *of* population has led to housing shortages.” (Awkward construction)
– “They discussed *on* the problem during the meeting.” (Unnecessary preposition)
Correct versions:
– “I’m interested *in* environmental science.”
– “The increase *in* population has led to housing shortages.”
– “They discussed the problem during the meeting.”
IELTS Impact: While single preposition errors might not significantly impact your score, a pattern of misuse suggests limited language proficiency and can affect both writing and speaking assessments.
Highbrow IELTS Tip: Instead of memorizing prepositions in isolation, learn common collocations (verb + preposition, adjective + preposition patterns). Our Collocation Database provides over 2,000 common combinations frequently tested in IELTS.
Run-on Sentences and Comma Splices
Run-on sentences occur when two independent clauses are joined without proper punctuation or conjunctions. Comma splices happen when only a comma is used to join independent clauses.
Common mistakes:
– “The city has excellent public transportation and many residents don’t own cars.” (Run-on)
– “The experiment was successful, the researchers published their findings.” (Comma splice)
– “Although the weather was terrible, we still went hiking, we wanted fresh air.” (Multiple clause issues)
Correct versions:
– “The city has excellent public transportation; therefore, many residents don’t own cars.”
– “The experiment was successful, so the researchers published their findings.”
– “Although the weather was terrible, we still went hiking because we wanted fresh air.”
IELTS Impact: Run-on sentences and comma splices directly impact the Coherence and Cohesion criterion, making your writing difficult to follow. These errors typically limit candidates to Band 6 in writing.
Highbrow IELTS Tip: Learn to identify independent and dependent clauses. Our Sentence Structure Mastery program teaches students to recognize and fix run-on sentences through targeted exercises and regular feedback.
Misuse of Conditional Structures
Conditional sentences (if-then structures) follow specific patterns in English. Many IELTS candidates struggle with the proper form for different types of conditionals.
Common mistakes:
– “If I will study harder, I will pass the exam.” (First conditional error)
– “If I would have known, I would have helped.” (Third conditional error)
– “If the weather is good, we would go to the beach.” (Mixed conditional error)
Correct versions:
– “If I study harder, I will pass the exam.”
– “If I had known, I would have helped.”
– “If the weather is good, we will go to the beach.”
IELTS Impact: Conditional structures frequently appear in IELTS Speaking Part 3 and Writing Task 2. Misusing them suggests an incomplete understanding of English grammar and limits your Grammatical Range and Accuracy score.
Highbrow IELTS Tip: Master the structure of all conditional types systematically. Our “Conditional Confidence” workshop breaks down each type with clear examples and practice exercises designed specifically for IELTS tasks.
Countable/Uncountable Noun Confusion
English divides nouns into countable (things you can count) and uncountable (things you measure) categories. This distinction affects article usage, verb agreement, and quantifier choice.
Common mistakes:
– “I need to buy *some furnitures* for my new apartment.” (Uncountable noun made plural)
– “She gave me *many advices* about the test.” (Uncountable noun made plural)
– “There aren’t *enough space* in this room.” (Wrong quantifier with uncountable noun)
Correct versions:
– “I need to buy some furniture for my new apartment.”
– “She gave me a lot of advice about the test.”
– “There isn’t enough space in this room.”
IELTS Impact: Confusion between countable and uncountable nouns affects multiple aspects of grammar simultaneously (articles, pluralization, quantifiers). These errors become particularly apparent in Task 1 reports where candidates must describe quantities and measurements.
Highbrow IELTS Tip: Create personalized lists of common uncountable nouns in your field of study or interest. Our Noun Classification System helps students categorize and use nouns correctly through immersive exercises and practical applications.
Relative Clause Errors
Relative clauses add information about a noun using pronouns like who, which, that, whose, etc. Many candidates struggle with choosing the correct relative pronoun or structuring the clause properly.
Common mistakes:
– “The man *which* spoke at the conference was a famous scientist.” (Wrong relative pronoun)
– “The book *who* I read last week was fascinating.” (Wrong relative pronoun)
– “The city *that I visited it* last summer was beautiful.” (Redundant pronoun)
Correct versions:
– “The man *who/that* spoke at the conference and was a famous scientist.”
– “The book *that/which* I read last week was fascinating.”
– “The city *that I visited* last summer was beautiful.”
IELTS Impact: Relative clause errors affect sentence complexity and variety, which are essential components of higher band scores (7+). Using relative clauses correctly demonstrates sophisticated grammar control.
Highbrow IELTS Tip: Learn the specific uses for each relative pronoun. At Highbrow IELTS Institute, our Advanced Grammar workshops include specialized sections on forming and punctuating relative clauses correctly for maximum impact in both writing tasks.
Modal Verb Misuse
Modal verbs (can, could, should, would, might, must, etc.) express possibility, necessity, permission, or ability. Their correct usage demonstrates nuanced language control.
Common mistakes:
– “You *must to* submit the application by Friday.” (Adding ‘to’ after a modal)
– “I *can to speak* three languages fluently.” (Adding ‘to’ after a modal)
– “She *must went* to the doctor yesterday.” (Using past form after modal)
Correct versions:
– “You must submit the application by Friday.”
– “I can speak three languages fluently.”
– “She must have gone to the doctor yesterday.”
IELTS Impact: Modal verbs feature prominently in Task 2 essays where you need to express opinions, suggestions, and possibilities. Incorrect usage limits your ability to express nuance, affecting both Lexical Resource and Grammatical Range scores.
Highbrow IELTS Tip: Focus on understanding the subtle differences between similar modals (might vs. may, should vs. must). Our Modal Mastery program helps students develop intuition for natural modal usage through contextual learning.
Passive Voice Errors
The passive voice (subject receives the action) is common in academic and formal writing but often causes problems for IELTS candidates.
Common mistakes:
– “The research paper *written* by Professor Smith.” (Incomplete passive – missing verb)
– “The event *was organize* by volunteers.” (Incorrect past participle)
– “The building *is being built since* 2020.” (Incorrect tense form in passive)
Correct versions:
– “The research paper *was written* by Professor Smith.”
– “The event *was organized* by volunteers.”
– “The building *has been being built since* 2020.”
IELTS Impact: Passive voice is particularly important for Task 1 Academic reports where processes need to be described objectively. Incorrect passive constructions can significantly limit your score in the 6.5-7.5 band range.
Highbrow IELTS Tip: Practice transforming active sentences to passive and vice versa. Our specialized Academic Writing course includes extensive passive voice training specifically designed for Task 1 responses.
How Highbrow IELTS Institute Can Help You Avoid These Mistakes
At Highbrow IELTS Institute, we’ve developed a systematic approach to eliminating these common grammar errors:
Personalized Grammar Assessment
Our expert trainers conduct a thorough analysis of your current grammar usage, identifying your specific weak points. Using our proprietary Grammar Profile System, we create a customized improvement plan targeting your particular needs.
Targeted Skill Development
Rather than generic grammar lessons, we focus on the specific error patterns relevant to IELTS tasks. Our specialized modules address each of the ten common mistakes with practical applications for both the Speaking and Writing components.
Realistic Practice and Feedback
Our simulated IELTS tasks provide opportunities to apply grammar knowledge in authentic contexts. Expert trainers provide detailed feedback focusing specifically on grammatical accuracy and range.
Technology-Enhanced Learning
Our Grammar Correction AI tool provides instant feedback on written work, helping you develop self-correction skills. The tool is specifically calibrated to detect the common errors outlined in this article.
Proven Track Record
With over 95% of our students achieving their target band scores, Highbrow IELTS Institute has established itself as a leader in IELTS preparation. Our unique grammar-focused approach has helped students who previously struggled to break through band score plateaus.
Grammar mistakes can be the invisible barrier preventing you from achieving your target IELTS score. By focusing on these ten common errors and implementing the suggested corrections, you can significantly improve your performance in both the Writing and Speaking modules.
Remember that grammar is not just about correctness—it’s about precision in communicating your ideas. At Highbrow IELTS Institute, we believe that strong grammatical foundations lead to confident language use, which ultimately translates to higher band scores.
Whether you’re aiming for academic purposes or immigration requirements, our specialized programs can help you overcome these common grammatical hurdles. Contact Highbrow IELTS Institute today for a free grammar assessment and take the first step toward grammatical excellence and IELTS success.
*Highbrow IELTS Institute offers comprehensive preparation programs for all IELTS modules. With centers in major cities and online learning options, we provide flexible scheduling to accommodate busy professionals and students. Visit our website or call us at [contact information] to schedule your free consultation and grammar assessment.*