Tense Review for IELTS (Present Perfect vs Past Simple & More)

Tense errors are among the most common grammar mistakes in IELTS Writing and Speaking. The examiner does not expect perfection, but consistent errors with basic tenses will cap your score at Band 6. This lesson reviews the tenses that cause the most confusion and shows you exactly how to use them in IELTS contexts.

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The Big Confusion: Present Perfect vs Past Simple

This is the single most important tense distinction for IELTS candidates to master.

Past Simple: Completed Actions at a Specific Time

Use the past simple when the action is finished and you mention or imply a specific time:

The government introduced new regulations in 2015.

Crime rates fell significantly last year.

I visited London when I was 15.

Time markers: yesterday, last week/month/year, in 2020, ago, when I was…

Present Perfect: Connection to the Present

Use the present perfect when the action has a connection to now — either it is still relevant, still continuing, or the exact time is not specified:

The government has introduced several new policies. (still relevant now)

Crime rates have fallen significantly over the past decade. (up to now)

I have visited London three times. (in my life so far)

Time markers: already, yet, just, ever, never, recently, so far, since, for, over the past…, in recent years

The Key Distinction

Past Simple	Present Perfect
Specific finished time	No specific time / continues to present
in 2019, last year, yesterday	since 2019, over the past year, recently
China built 100 hospitals in 2020.	China has built hundreds of hospitals since 2010.
The company closed in March.	The company has closed. (news — just happened)

Common Errors

❌ The number of tourists has increased in 2019.

✅ The number of tourists increased in 2019. (specific past time → past simple)

❌ Since 2010, the population increased by 20%.

✅ Since 2010, the population has increased by 20%. ("since" → present perfect)

❌ I have visited Paris last summer.

✅ I visited Paris last summer. ("last summer" → past simple)

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Present Perfect in IELTS Writing Task 1

The present perfect is essential for describing trends that continue to the present:

The number of international students has risen steadily since 2005.

Sales have increased by approximately 30% over the period shown.

There has been a dramatic decline in newspaper readership in recent years.

Contrast with past simple for completed periods:

Between 2000 and 2010, the figure rose from 50 to 80. (completed period → past simple)

Since 2010, the figure has continued to rise. (up to present → present perfect)

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Present Perfect Continuous

Use this to emphasise the duration or ongoing nature of an action:

Scientists have been studying this phenomenon for decades.

The population has been growing at an unprecedented rate.

Researchers have been investigating the link between diet and health.

Present perfect simple vs continuous:

She has written three books. (focus on result — three completed books)

She has been writing a book for two years. (focus on duration — still writing)

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Past Simple vs Past Continuous

Past Simple: Completed single actions

The accident happened at 3 p.m.

Past Continuous: Actions in progress at a point in the past

He was driving when the accident happened.

Combined:

While the economy was recovering, the government introduced austerity measures.

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Past Perfect: The "Before Past"

The past perfect (had + past participle) is used for an action that happened before another past action:

By the time the ambulance arrived, the patient had already died.

The company had invested heavily before the market crashed.

IELTS use:

The graph shows that by 2010, the figure had reached 80%, having risen steadily from 50% in 2000.

Common error: