IELTS Writing Task 1 Grammar Errors Checker: Your Band Score Guide

Here's what nobody tells you: grammar mistakes in Task 1 don't just cost you a few points. A single pattern of errors can lock you out of Band 7 entirely, no matter how well you organize your letter or nail that graph description. The band descriptors for IELTS Writing are brutal about Grammatical Range and Accuracy, and examiners spot consistent, deliberate mistakes immediately.

This guide breaks down the grammar errors that actually tank your score in Task 1, shows you exactly how they do it, and gives you a real system to catch them before test day using an IELTS writing checker approach.

Why Grammar Errors Kill Your Band Score in Task 1

Let's get specific. The IELTS band descriptors for Grammatical Range and Accuracy say: Band 8 uses a wide range of structures with rare errors. Band 6 uses a mix of simple and complex sentences with some errors that don't impede meaning. Band 5 produces simple sentences mostly accurately but has errors in complex structures.

The gap between Band 6 and Band 7? It's brutal. At Band 7, you need "mostly accurate" grammar with only "occasional errors." That means you can't have three or four mistakes per paragraph. You need near-perfect accuracy with deliberate variety.

Here's the real problem: Task 1 is often your warmup essay. You've got 20 minutes to write 150 words minimum. Most students rush through it thinking, "It's just a letter or description, how hard can it be?" Then they throw in subject-verb agreement mistakes, tense shifts, and article errors that compound into a Band 6 ceiling.

The weak version has three errors in two sentences: subject-verb agreement (have/has), verb form (relocating/relocate), and article confusion (This/These). The strong version has clean grammar and uses more sophisticated phrasing (genuinely concerned).

The 5 Common Grammar Mistakes That Cost You the Most Points in Task 1

Not all grammar errors are created equal. Some mistakes are automatic Band 6 blockers. Others examiners tolerate at Band 7 if they're rare. Here are the five that matter most in Task 1.

1. Subject-Verb Agreement

This is the number-one error I see in Task 1 essays. Students write phrases like "The data shows" and "The statistics shows" inconsistently in the same letter. Examiners notice these immediately because they're so basic.

Your brain gets confused because "graphs" is plural and sits right before the verb. But the actual subject is "information," which is singular. This one rule costs dozens of students a band score every year.

2. Tense Inconsistency

Task 1 letters often jump between past, present, and future without reason. A complaint letter should stay in past tense when describing the problem. A formal request might use present for context and conditional future for what you want. Task 1 graphs should use past tense for completed data and present perfect for trends.

The weak version shifts tense for no reason: past (was), present (ignores), present (is). The strong version keeps past tense for everything that happened during the stay.

3. Article Errors (A/An/The)

English articles are notoriously hard for non-native speakers. In Task 1, students often drop "the" before specific nouns or add "a" where it doesn't belong. Band 7 requires near-perfect article usage.

The specific booking and payment both need "the" because they're defined by context. This error pattern signals Band 5-6 grammar to examiners immediately.

4. Verb Form Errors

This includes gerunds vs. infinitives, wrong participles, and mismatched auxiliary verbs. In Task 1 letters requesting action, students often write "I would like to requesting" or "I need you help me."

The weak version has both a missing object (it) and an incorrect infinitive form (to send instead of send after could). These errors compound quickly.

5. Preposition Errors

Prepositions trip up even strong writers. Task 1 errors like "concerned about" vs. "concerned with," "complain to" vs. "complain about," and "different from" vs. "different than" pop up constantly.

Here's a real one: "I would like to discuss about this issue" (should be "discuss this issue," not "discuss about"). The preposition is redundant.

In British English (IELTS standard), "different from" is correct. "Different than" is American and marks you as not meeting the formal register required for Band 7.

How to Catch Grammar Errors Before Submission

You've got 20 minutes for Task 1. That leaves maybe 3-4 minutes for checking. Here's a ruthless prioritization system that works under exam pressure.

First pass (60 seconds): Tense check. Read through and underline every verb. Make sure all verbs in the same timeframe match. If you're describing a complaint, all problem descriptions should be past tense. Lock this in first because it's the most obvious pattern to an examiner.

Second pass (60 seconds): Subject-verb agreement. For every verb, ask yourself: "What's the actual subject of this sentence?" Cover up the words between subject and verb if you get confused. Write "Subject + Verb" above the line if you're uncertain. This catches the majority of Band 6 blockers.

Third pass (60 seconds): Articles before nouns. Circle every noun. Ask yourself: Is this specific (the) or general (a/an) or uncountable (no article)? Native speakers do this unconsciously, but you need a conscious system. Specific past events get "the." General categories get "a/an." Uncountable nouns (money, information, equipment) get no article or "the" if specific.

Fourth pass (remaining time): Read aloud in your head. Awkward phrasing often signals a grammar error you missed. If a sentence feels wrong when you read it, it probably is.

Common Task 1 Grammar Patterns by Letter Type

Different letter types have different grammar pitfalls. Here's what to watch for.

Complaint letters: Watch for present tense bleeding in. Your complaint happened (past tense). The problem might still exist, but you're describing a finished experience. "The room was dirty" not "The room is dirty." Also catch yourself on modal verbs: "I could not sleep" not "I could not to sleep."

Formal requests: These often need conditional future or polite present. "I would appreciate if you could..." not "I would appreciate if you will..." Also watch for imperative forms: "Please send" not "Please to send."

Graph descriptions: You'll need to shift between data trends (past tense for completed data) and general observations (past tense). "The graph showed an increase from 2020 to 2021" (completed data, past tense) and "This suggests that consumer confidence was rising" (observation about that data, also past tense). Both stay past because the data collection is finished.

How Grammar Affects Your Overall IELTS Band Score

Let's talk numbers. The IELTS Writing band scale goes from 0 to 9. Here's how grammar specifically factors in across the bands for the Grammatical Range and Accuracy criterion.

• Band 8: Uses a wide range of structures with rare errors. Even Band 8 isn't perfect, but errors are genuinely infrequent and don't affect meaning.
• Band 7: Uses a mix of simple and complex sentences with mostly accurate grammar. "Occasional" errors only. In a 180-word essay, you might get 2-3 minor slips.
• Band 6: Uses simple and complex sentences with some errors that don't impede meaning. In a 180-word essay, 5-7 errors become noticeable. Examiners see a pattern forming.
• Band 5: Produces simple sentences mostly accurately but makes errors in complex structures. Can't reliably control more than one clause per sentence.

Grammar alone won't get you to Band 7 in Task 1. You also need good Task Response (answering the prompt fully), Coherence and Cohesion (clear organization and linking), and Lexical Resource (appropriate vocabulary). But grammar errors create a ceiling. You can't break Band 7 if you have more than occasional mistakes, period.

Real-Time Grammar Correction Systems That Actually Work

Be honest with yourself. Grammarly and similar tools help, but they miss IELTS-specific errors and sometimes suggest American English instead of British. They're useful for catching typos, but don't rely on them in the exam.

Your best real-time checking system is manual and systematic, like the four-pass method above. You can also build speed by keeping a personal error log. Every time you get feedback on an essay, write down the mistake type (tense shift, article, preposition, etc.). After 5-10 Task 1 essays, patterns emerge. Your brain then starts catching those mistakes faster because you're primed to notice them.

Here's another angle: write your Task 1 essay first. Then read it out loud (silently if you're in a test center) before checking. Your ears catch grammatical awkwardness faster than your eyes sometimes. Native speakers don't "think" about grammar; they feel when something sounds wrong. You can also use an IELTS writing checker to identify patterns you consistently miss.

Practice Strategy: From Band 6 to Band 7 Grammar

If you're stuck at Band 6, here's a three-step practice routine that works.

Step 1: Write one Task 1 essay under timed conditions (20 minutes). Don't worry about perfect grammar yet. Just get the content down.

Step 2: After time's up, do the four-pass check above. Mark every error you find. Count them. Aim to reduce the count by 50% within four weeks.

Step 3: For each error type, do one targeted exercise. If you made two subject-verb agreement errors, spend 10 minutes writing five sentences with tricky subjects (collective nouns, plural forms that feel singular). If you made three tense errors, write a short paragraph in past tense, then rewrite it in present tense, then rewrite it mixing both intentionally (then fix it). Repetition with feedback is how grammar sticks.

Most students skip Step 3 and wonder why they don't improve. Grammar isn't fixed by writing more essays. It's fixed by isolating the error, understanding the rule, and practicing that specific pattern repeatedly.

Frequently Asked Questions About IELTS Task 1 Grammar