The IELTS Task 1 Introduction: One Sentence, Four Facts

The IELTS Task 1 introduction is one sentence that says what the visual shows, where, when, and in what units. It contains no numbers, no trends and no opinion.

Advice pages disagree about this, mostly about length: one sentence, two sentences, or three if you like. The disagreement is not worth your attention, because the introduction is the cheapest paragraph in the paper and the one where candidates lose marks for the silliest reasons. This page shows what four scored answers actually wrote in that sentence, counted, and what went wrong in them. The bands quoted are estimates from Bandly's scoring engine, not marks from a qualified examiner.

What the introduction is for

Task 1 gives you a visual and a prompt. The prompt is a printed sentence such as The chart below shows the percentage of commuters using four types of transport in three cities in 2023.

Copying that sentence into your answer gives the marker nothing. Copied text is not your English, so it cannot demonstrate range or accuracy, and an answer that is largely copied has very little of your own writing left to assess. Rewriting it in your own words is the job, and the technical name for that is paraphrasing, which we cover in detail in paraphrasing the question.

The introduction is also an orientation. A reader who never sees your visual should know, after one sentence, what kind of picture it was and what it measured.

The four facts

Every Task 1 introduction carries up to four facts, taken straight from the prompt and the visual:

1. The visual type. Bar chart, line graph, table, pie chart, map, process diagram. Say which.
2. The subject. What is being measured or shown: household electricity use, recycling rates, how drinking water is produced.
3. The place or the categories. Which countries, cities, age groups or products.
4. The time. A single year, a range, or nothing at all when the visual has no time axis.

A fifth item, the unit, rides along with the subject when the unit is not obvious. Recycling rates as a percentage of total waste states its unit. Average household electricity use does not, and a reader cannot tell whether that is kilowatt hours a year or something else.

Not every visual has all four. A process diagram has no time period and often no place, so an introduction that invents one is wrong rather than complete. Our guide to describing a process diagram covers that case, where the sequence replaces the time axis.

What four scored answers actually wrote

Here is the counted part. We took every Task 1 Academic answer published in the Bandly sample library, four of them, and read only the first sentence of each. We counted the words, recorded which of the four facts appeared, and noted any grammar error. The estimates beside them are the engine's, and the whole answers are on the site.

Four findings, and the last one is the useful one.

All four are a single sentence. Nobody wrote two, and nothing in the estimates suggests a second sentence was missed. The length question answers itself: between 18 and 27 words is enough for most visuals, and the 32 word version is the one carrying the most padding.

All four name the visual type in the first three words. The bar chart, The line graph, The diagram, The table. This is the one fact no answer skipped.

Only one of the four states its unit. The table answer says as a percentage of total waste. The line graph answer says average household electricity use and never says in what. That is a precision gap, and precision is what Lexical Resource is about at band 7 and above.

Two of the four contain a subject-verb agreement error. The diagram illustrate, and The table compare. Both should end in s. These are two of the most rehearsed words a Task 1 candidate ever writes, in the sentence they have practised the most, and the error still arrived. The feedback on the first of them named it, pointing out that an error of that kind keeps the response from the consistent accuracy a higher Grammatical Range and Accuracy band needs.

That last finding is the reason this page exists. The introduction is not where you win marks; the overview and the body are. It is where a careless error gets written into the first line of the answer, before you have warmed up, in a sentence you thought was automatic.

Sentence patterns that work

The safest shape puts the visual type first, which also stops you drifting into a second clause:

• The [visual] shows [subject] in [place] between [year] and [year].
• The [visual] compares [subject] across [categories] in [year].
• The [visual] gives information about [subject] in [place] over a [number] year period.
• The diagram shows the stages in the process of [subject]. (No time, no place.)

Verbs that fit: shows, compares, gives information about, illustrates, presents. All of them take an s after a singular subject such as the chart. If you drill one thing from this page, drill that s.

Two more notes on the mechanics. Data is a plural noun in careful writing, so the data show, although the data shows is widely accepted and nobody should spend exam attention on it. And the unit belongs inside the subject phrase, not in brackets afterwards: write as a percentage of total waste, not (%).

What to leave out

• Numbers. No figures in the introduction. The highest value, the biggest change and the total all belong further down.
• The overview. The one or two sentences naming the main pattern are a separate move and usually a separate paragraph. The difference is set out in the Task 1 overview, and the two run together often enough that it is worth reading before your next practice answer.
• Opinion. Task 1 Academic asks for a report. This is an interesting trend is not scored and takes words from your 150.
• A preview of your paragraphs. This report will first describe the chart and then analyse it is an essay habit. It says nothing about the data.
• Copied phrasing. Summarise the information by selecting and reporting the main features is the instruction line printed on every Task 1 question. Repeating it is copying, and it is immediately recognisable as such.

Paraphrasing the prompt without breaking it

Change the structure rather than swapping single words. The chart below shows the percentage of commuters using four types of transport in three cities in 2023 can become The bar chart compares how commuters in three cities travelled in 2023, across four types of transport. The clause order moved, percentage became how ... travelled, and the sentence reads naturally.

Some words cannot be changed, and should not be. Proper nouns stay: Germany is Germany. Technical terms stay: unemployment rate has no safe synonym, and rate of people without jobs is longer and less precise. Numbers and years stay. Our post on IELTS writing synonyms works through why a forced substitution costs more than the repetition it avoids, using a sentence from the same bar chart answer in the table above.

A short checklist for the sentence you just wrote: is the verb agreeing with its subject, is every fact in it actually in the prompt, and is there a number in it that should not be there.

Two worked repairs

Taking the two flawed openings from the table and fixing only what is wrong:

The diagram illustrate the multi-stage process of how clean drinking water is produced at a municipal treatment plant.

becomes

The diagram shows the stages by which clean drinking water is produced at a municipal treatment plant.

The verb agrees now, and the stages by which replaces the multi-stage process of how, which said stages twice. Eighteen words became sixteen, and the sentence is a process introduction with no invented time period.

The table compare the household recycling rates as a percentage of total waste in Germany, South Korea, United Kingdom, United States, and Turkey in 2005 and 2020.

becomes

The table compares household recycling rates, as a percentage of total waste, in five countries in 2005 and 2020.

The verb agrees, and the five country names move out of the introduction. Naming them here costs eleven words and tells the reader nothing they will not learn in the body, where the comparison actually happens. Twenty-seven words became nineteen, and the unit survived the cut, because the unit is the fact a reader cannot reconstruct.

You can read both answers in full, with each criterion estimated and the evidence marked on the text, on the Task 1 Academic table samples page and across the band 7.5 samples.

What to do today

Take three Task 1 prompts and write only the introduction for each. Three sentences in total, no visuals needed, five minutes. Then check each one for the s on the verb, for a number that should not be there, and for a missing unit.

Do that on three more tomorrow and the sentence becomes genuinely automatic, which is the point: the introduction should cost you ninety seconds and no attention, so that both are available for the overview, where the marks are.

When you want to see how the rest of your answer is holding up, paste a full Task 1 response into Bandly. It returns an estimated band for each of the four criteria with the sentences behind them marked, so an agreement error in your first line is visible rather than invisible. Those bands are estimates from a scoring engine, not marks from a qualified examiner, and they are most useful for showing you which sentence to rewrite next.