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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
in then
Grammar usage guide and real-world examplesUSAGE SUMMARY
'in then' is not correct or usable in written English.
The correct phrase is 'then,' and it is used to indicate something that will happen after another event. Example sentence: I will finish my chores and then I can watch television.
⚠ May contain grammatical issues
News & Media
Science
Wiki
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
59 human-written examples
What region is Atlanta in, then?
News & Media
"Come on in, then.
News & Media
That's where those "scratches" come in, then.
News & Media
Where denial sets in, then, is hard to pinpoint.
News & Media
"If everybody's pitching in, then we'll try to pitch in".
News & Media
"The schools come in, then the houses," Mr. Russo said.
News & Media
The artists moved in, then the galleries, then the money.
News & Media
If you don't fit in, then don't fit in".
News & Media
"If someone new comes in, then great.
News & Media
If in, then.
Human-verified similar examples from authoritative sources
Similar Expressions
1 human-written examples
Like choking on the title run-in, then, we presume.
News & Media
Expert writing Tips
Best practice
When intending to convey a sequence of actions, it is better to use "and then" or "then" alone to ensure clarity and grammatical correctness.
Common error
Avoid using "in then" to link events sequentially. This construction is often grammatically incorrect and can confuse readers. Instead, opt for "and then" or simply "then".
Source & Trust
83%
Authority and reliability
2.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "in then" is often used incorrectly as a sequential connector. Ludwig AI points out that this construction is generally not grammatically sound. Its intended function is typically to indicate a sequence of events, but it fails to do so effectively in standard English.
Frequent in
News & Media
31%
Science
25%
Wiki
12%
Less common in
Formal & Business
10%
Reference
10%
Social Media
2%
Ludwig's WRAP-UP
The phrase "in then" is generally considered grammatically incorrect in standard English, as noted by Ludwig AI. While it appears frequently across various sources, including News & Media and Science, its usage often represents colloquial speech or specific scientific contexts where "in" refers to set membership, making it a potential source of confusion. To ensure clarity and grammatical correctness, it's recommended to use alternatives such as "and then" or simply "then" to indicate a sequence of actions. When aiming to show consequence, phrases like "as a result" or "therefore" are more appropriate.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
and then
This is the best alternative as it directly fixes the incorrect form of "in then".
so
A simpler alternative, indicating a direct consequence or conclusion.
after that
Provides a more explicit sequential connection compared to "in then".
following that
Similar to "after that", but adds a sense of direct consequence or order.
subsequently
Replaces "in then" with a single adverb indicating something happening after a previous event.
thereafter
A formal synonym indicating a later time or event, offering a more polished alternative.
in turn
Emphasizes a sequence where events trigger each other, unlike the more ambiguous "in then".
consequently
Highlights the outcome of an action or situation, adding a cause-and-effect dynamic.
as a result
Focuses on the consequential relationship between actions, differing from simple sequencing.
accordingly
Suggests an action is performed in a manner that aligns with a previous condition.
FAQs
What is the correct way to express a sequence of events?
To properly show a sequence, use "and then" or just "then". For example, "I finished my work, and then I went home" or "I finished my work, then I went home".
Is "in then" ever grammatically correct?
In most contexts, "in then" is grammatically incorrect. However, it might appear in highly specific mathematical or logical contexts where "in" refers to set membership. For general use, avoid it.
What are some alternatives to "in then" for showing consequence?
Alternatives that show consequence include phrases like "as a result", "therefore", or "consequently".
How can I avoid using "in then" incorrectly?
Double-check your sentence structure when using "in" followed by a time-related word. Replace "in then" with "and then" or simply "then" for clarity and correctness.
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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
83%
Authority and reliability
2.5/5
Expert rating
Real-world application tested