Here's what catches most students off guard: singular-plural agreement errors tank your band score in IELTS Writing Task 1, and you won't even see them coming. You'll write a solid letter complaining about a service or requesting something, hit all the task requirements, and then lose marks in "Grammatical Range & Accuracy" because your subjects and verbs don't match. This guide shows you exactly what to watch for and how to spot these mistakes before you hand it in.
The IELTS examiners grade you explicitly on grammatical accuracy. A Band 7 needs "mostly accurate" grammar with only "occasional" slip-ups. Band 6 allows more mistakes, but you still need to nail basic agreement. Anything below that? Agreement errors start piling up.
The sneaky part is this: a missing "s" on a verb looks tiny. But examiners hear it immediately. It signals either careless proofreading or shaky grammar foundations. In a 150-word letter where every single word counts, losing 2-3 marks for grammar can drop you from 7.0 to 6.5 in a heartbeat.
Task 1 is short—150 words minimum versus 250 for Task 2—so every grammar mistake has outsized impact. You can't hide a mistake in a short piece. One error stands out.
You'll see these slip-ups repeatedly in student work.
This is the king of agreement errors. You write a plural subject but then use a singular verb.
Wrong: "The damages to my apartment from the flooding has caused significant inconvenience."
"Damages" is plural. It needs "have," not "has."
Right: "The damages to my apartment from the flooding have caused significant inconvenience."
Watch for this one too:
Wrong: "My concerns about the late delivery and poor service is the reason for this letter."
"Concerns" is plural. Change "is" to "are."
Right: "My concerns about the late delivery and poor service are the reason for this letter."
These trip up everyone. Collective nouns look singular but refer to groups. The rule: if the noun acts as one unit, use singular. If you're talking about individual members, use plural.
In British English (the standard for IELTS), collective nouns shift toward plural more often than in American English.
Wrong: "The company is not meeting its commitments to customers. They is unresponsive."
Once you say "they," you've made it plural. Stay consistent.
Right: "The company is not meeting its commitments to customers. It is unresponsive." OR "The company and its staff are not meeting their commitments. They are unresponsive."
These destroy even advanced writers. "None of" can go either way in modern English, but "each of" is always singular.
Wrong: "Each of the items in my order were damaged during shipping."
Right: "Each of the items in my order was damaged during shipping."
"Each" is always singular. Full stop.
You're writing fast. Tone, politeness, structure—all fighting for your attention. Your brain latches onto the plural noun and holds it even after a preposition phrase. Example:
Wrong: "The delay in my two bookings have created problems."
You're thinking "two bookings" (plural) and write "have" automatically. But the actual subject is "delay" (singular). It should be "has."
Right: "The delay in my two bookings has created problems."
You can't just trust your gut. You need a system.
Quick trick: When you're checking your work, cover up everything between your subject and verb. Ask: what's actually doing the action? Only that word matters.
Lock these in and you'll catch almost every agreement mistake in your IELTS writing task 1 letter.
Write these down. Tape them to your desk. Reference them while you draft.
Exam time is tight. Use this targeted approach instead of random rereading. This method catches singular plural agreement errors faster than any IELTS grammar checker can.
Step 1: Find every verb. Circle them mentally or on paper—is, are, was, were, has, have. See them all at once.
Step 2: Work backwards to find the subject. Ask "who or what is doing this?" Ignore everything in between. If you can't find the subject, that's your red flag.
Step 3: Match subject and verb in number. Say them together silently. Does "damages have" or "damage has" sound right? Your ear knows.
Step 4: Watch "there is/are" sentences. The real subject comes after. "There are several issues with the service" (not "there is"). Issues = plural.
This takes 2-3 minutes for a 150-word letter. Way faster than you think.
In the exam: Even if you skip some lines, do this check. Two solid minutes of focused grammar review beats five minutes of aimless rereading.
IELTS Task 1 tests three letter types: formal complaints, requests, and explanations. Here's where singular plural agreement errors hide in each.
Prompt: "Write a letter complaining about a faulty product you purchased."
Wrong: "The faults with the headphones is unacceptable for the price paid. The broken wires and faulty audio connector has ruined my experience."
"Faults" needs "are." "Wires and connector" is a compound subject—needs "have."
Right: "The faults with the headphones are unacceptable for the price paid. The broken wires and faulty audio connector have ruined my experience."
For complaint letters specifically, check out our guide on tone and politeness—agreement is just one piece. You also need to avoid sounding angry or exaggerated. Our checklist on avoiding exaggeration walks you through that.
Prompt: "Write a letter requesting a change in your work schedule."
Wrong: "The current timing of shifts and the travel distance is causing strain. My responsibilities at home requires flexibility."
"Timing and distance" needs "are." "Responsibilities" needs "require."
Right: "The current timing of shifts and the travel distance are causing strain. My responsibilities at home require flexibility."
Your own eyes won't catch everything. An IELTS writing checker can help, but you need real strategies too.
Read backwards, sentence by sentence. This breaks the reading flow so your brain stops autocorrecting errors. You're hunting for grammar, not meaning, so backwards reading works.
Use an automated grammar checker. It won't catch every nuance, but it'll flag agreement problems and give you a second set of eyes. That's worth 30 seconds.
Strip sentences down to subject + verb. "Damages caused" or "damage caused"? Remove all the extra words and the error becomes obvious.
Study Band 7-8 sample letters. Not to copy, but to absorb how strong writers handle subject-verb relationships. You'll internalize patterns faster than memorizing rules alone. Check out our band score guides for real examples.
Pro tip: If English isn't your first language, print your letter and mark every subject-verb pair with a pen. You'll see patterns in your mistakes and know what to watch for next time.
The Grammatical Range & Accuracy criterion is roughly 25% of your writing score (one of four criteria: Task Response, Coherence & Cohesion, Lexical Resource, Grammatical Range & Accuracy).
Band 7 allows "occasional" errors that don't break meaning. A few agreement slips might drop you to 6.5-7.0 in this criterion alone. If your other scores are borderline, that cascades into a 6.5 or 6.0 overall.
In numbers: fixing 2-3 systematic agreement errors in Task 1 can bump you from 6.5 to 7.0. That's half a band. That matters for university admissions and visa requirements.
Use our IELTS writing checker to spot singular plural agreement errors before you submit. Get real-time grammar feedback and see exactly how it impacts your band score.
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