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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
they were then
Grammar usage guide and real-world examplesUSAGE SUMMARY
"they were then" is a perfectly usable phrase in written English.
It is generally used to refer to a time or event in the past. For example, "We celebrated their wedding a few months ago; they were then the happiest couple I had ever seen."
✓ Grammatically correct
Science
News & Media
Academia
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
58 human-written examples
They were then assayed for calcium content and cell proliferation.
They were then debriefed.
Science & Research
They were then taken into custody.
News & Media
They were then asked about their experience.
News & Media
They were then banked, taxed, and legitimised.
News & Media
They were then buried in mass graves.
News & Media
They were then sent to Colditz.
News & Media
Which they were then – by miles.
News & Media
They were then driven back south.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
2 human-written examples
They were then dried using air at 60 °C.
Science
They were then debriefed and paid £6.
Science
Expert writing Tips
Best practice
Ensure the context makes it clear who "they" refers to, avoiding ambiguity in your writing.
Common error
Avoid using "they were then" when you intend to describe a current state. This phrase is specifically for past events and can confuse readers if used incorrectly.
Source & Trust
82%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "they were then" functions as a temporal marker, indicating the state or action of a group at a specific point in the past, relative to another event. Ludwig provides numerous examples showing its use in sequencing events.
Frequent in
Science
33%
News & Media
33%
Academia
17%
Less common in
Wiki
8%
Formal & Business
0%
Reference
0%
Ludwig's WRAP-UP
The phrase "they were then" serves as a temporal marker, indicating the state or action of a group at a specific point in the past, relative to another event. Ludwig indicates this phrase is grammatically sound and usable in written English. With a common frequency, it appears in various contexts, notably science, news, and academic writing. While other phrases can substitute it, such as "subsequently they were" or "afterward they were", the key is maintaining clarity in the chronological sequence. Remember, "they were then" should only be used to describe past states and actions, avoiding confusion with present conditions.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
subsequently they were
Reorders the phrase to emphasize the sequence more directly.
afterward they were
Uses a different adverb to indicate a sequence of events.
following that, they were
Adds a transition to explicitly mark the sequence.
thereafter they were
Employs a more formal adverb to indicate time sequence.
at that point, they were
Highlights a specific moment in time.
in those days, they were
Frames the action within a specific historical period.
at the time, they were
Focuses on the circumstances surrounding the action.
they had been
Changes the tense to past perfect, slightly altering the emphasis.
previously, they were
Highlights something that took place before what is being discussed.
before that time, they were
More explicitly states the preceding nature of events.
FAQs
How can I use "they were then" in a sentence?
Use "they were then" to indicate what state a group of people or things were in at a specific point in the past, often in relation to a sequence of events. For instance, "After the initial shock, "they were then" able to formulate a plan".
What's the difference between "they were then" and "they are now"?
"They were then" refers to a past state or condition, while "they are now" describes the current state. The former is used to contrast a past situation with the present; the latter focuses on the current situation.
Which is correct, "they were then" or "than"?
"They were then" indicates a point in time. "Than" is used for comparisons. These terms are not interchangeable. For example, you would say ""they were then" students", not "they were than students".
What can I say instead of "they were then"?
Depending on the context, you could use alternatives like "subsequently they were", "afterward they were", or "at that point, they were" to express a similar sequence of events.
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Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
82%
Authority and reliability
4.5/5
Expert rating
Real-world application tested