Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
decades ago
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "decades ago" is correct and usable in written English.
It can be used to refer to a time period that occurred many years in the past, typically ten years or more. Example: "The invention of the internet revolutionized communication, but it was first conceptualized decades ago."
✓ Grammatically correct
News & Media
Science
Formal & Business
Alternative expressions(20)
many years back
in previous decades
several years prior
a long time back
in earlier periods
a good while ago
in former times
in bygone eras
some time back
many years ago
a long time ago
centuries ago
decades later
times ago
in recent decades
for decades
since generations
many decades ago
over the decades
dating back decades
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
39 human-written examples
This was five decades ago.
News & Media
Pratt bought it decades ago.
News & Media
A couple of decades ago.
News & Media
The original disappeared, inexplicably, decades ago.
News & Media
The panes were removed decades ago.
News & Media
These remarkable trends began decades ago.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
20 human-written examples
I don't list positions from decades ago.
News & Media
Thatcher was prime minister three decades ago.
News & Media
Three decades ago, none of this existed.
News & Media
But that imploded two decades ago.
News & Media
Four decades ago, a bargain was struck.
News & Media
Expert writing Tips
Best practice
Consider the specific decade or era you're referencing. If precision is important, specify "in the 1980s" instead of simply saying "decades ago".
Common error
Avoid using "decades ago" when the exact number of years is crucial. If you mean 20 years, specifying "two decades ago" is more accurate than a generalized timeframe.
Source & Trust
86%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "decades ago" functions as an adverbial phrase modifying a verb or clause to indicate when an action or state occurred. It specifies a general time frame in the past, as shown in Ludwig's examples: "The panes were removed decades ago." or "That was decades ago, though."
Frequent in
News & Media
74%
Science
17%
Formal & Business
9%
Less common in
Encyclopedias
0%
Wiki
0%
Reference
0%
Ludwig's WRAP-UP
In summary, the adverbial phrase "decades ago" is a grammatically sound and commonly used expression to refer to a period many years in the past. Ludwig AI confirms this phrase appears most frequently in News & Media and Science contexts. When using "decades ago", ensure your context provides a clear reference point and be mindful of overlapping timeframes, favoring more specific expressions when precision is necessary.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
many years back
Emphasizes the distance in time from the present.
in previous decades
Highlights that the time frame relates to earlier decades.
years in the past
Focuses on the past nature of the time period.
several years prior
Indicates that something happened some years before a certain point.
a long time back
General term indicating a considerable amount of time has passed.
in earlier periods
Emphasizes that the specified time frame came before the present.
a good while ago
Informal way of indicating a significant amount of time.
in former times
Refers to a time in the past, often contrasting it with the present.
in bygone eras
Suggests a period from the past which is considered to be over.
some time back
A more vague term for indicating that something occurred in the past.
FAQs
How can I use "decades ago" in a sentence?
You can use "decades ago" to refer to events or trends that happened many years in the past. For example, "Decades ago, personal computers were not as common as they are today."
What is a more formal alternative to "decades ago"?
For a more formal tone, you could use phrases such as "many years prior", "in previous decades", or "several years before."
Is it more appropriate to say "decades ago" or "a few decades ago"?
Both phrases are acceptable, but "a few decades ago" implies a shorter time frame than simply "decades ago". The choice depends on the specific context and the level of precision needed.
How does "decades ago" differ from "centuries ago"?
"Decades ago" refers to a time period within the last 100 years or so, while "centuries ago" refers to a much more distant past, specifically hundreds of years ago.
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
86%
Authority and reliability
4.5/5
Expert rating
Real-world application tested