three decades

USAGE SUMMARY

The phrase "three decades" is a correct and commonly used part of a sentence in written English.
It refers to a period of thirty years and can be used in various contexts. Example: "John has been working as a doctor for three decades now." This sentence means that John has been a doctor for thirty years. Another example: "The city has undergone significant changes in the past three decades." This sentence means that the city has experienced significant changes over the course of thirty years.

✓ Grammatically correct

News & Media

Human-verified examples from authoritative sources

Exact Expressions

45 human-written examples

Flash-forward three decades.

The New York Times - Magazine

And for three decades.

The New York Times

It has spanned three decades.

The New York Times

Three decades of aging potential?

The New York Times - Food

Three decades later, 42% were.

The Economist

Only three decades to go.

The New Yorker

Human-verified similar examples from authoritative sources

Similar Expressions

13 human-written examples

Thatcher was prime minister three decades ago.

The Guardian - Opinion

Three decades ago, none of this existed.

The New York Times

And that's, what, three decades ago?

The New York Times - Sports

For three decades.

The Guardian

The programme spanned three decades.

The Guardian

Expert writing Tips

Best practice

When describing trends or changes, use "three decades" to provide a sense of historical context. This phrasing is suitable for both formal and informal writing, offering a concise way to refer to a significant period.

Common error

Avoid using "decade" as a singular noun when referring to thirty years. "Three decades" correctly indicates the plural form, representing multiple ten-year periods. Using "three decade" is grammatically incorrect.

Linguistic Context

The phrase "three decades" primarily functions as an adverbial modifier of time, indicating the duration over which an action or state occurs. Ludwig AI confirms this usage. For example, "Inequality has been rising for three decades."

Expression frequency: Common

Frequent in

News & Media

86%

Formal & Business

7%

Science

7%

Less common in

Encyclopedias

0%

Wiki

0%

Reference

0%

Ludwig's WRAP-UP

In summary, the phrase "three decades" is a common and grammatically sound way to express a period of thirty years. Ludwig AI validates that this phrase is frequently used to provide temporal context, especially in news and media. While "three decades" and "thirty years" are often interchangeable, "three decades" emphasizes a succession of ten-year periods, adding historical perspective. To use it correctly, remember that the plural form "decades" is essential and can serve as a time marker in many contexts.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

thirty years

Direct synonym indicating the same time period.

a period of thirty years

More formal way to specify the duration.

for thirty years

Indicates a duration of time something has occurred.

three tens

Arithmetical expression of the same duration, less common in general context.

thirty-year period

An adjectival phrase describing the duration.

a generation

Approximates the time span, though a generation can vary.

three decades ago

Points to a specific period in the past.

over the last thirty years

Specifies a timeframe leading up to the present.

in the past three decades

Similar to 'over the last thirty years', focusing on a retrospective view.

three series of ten years

Describes "three decades" in an analytical way.

FAQs

How can I use "three decades" in a sentence?

"Three decades" is used to specify a period of thirty years. For example, "The company has been a leader in the industry for "three decades"." or "Significant advancements have been made in medicine over the past "three decades"."

What's the difference between "three decades" and "thirty years"?

While both phrases refer to the same duration, ""three decades"" is often used to emphasize the span as a succession of ten-year periods, whereas "thirty years" is a direct statement of the length of time. The choice depends on the context and desired emphasis.

Are there alternative phrases for "three decades"?

Yes, you can use phrases like "thirty years", "a period of thirty years", or even contextual references like "a generation" depending on the specific context.

Is it correct to say "three decade" instead of "three decades"?

No, "three decade" is grammatically incorrect. The correct plural form is ""three decades"" because it refers to multiple ten-year periods.