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
but not then
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "but not then" is correct and usable in written English.
It can be used to indicate a condition or situation that is not applicable at a specific time or moment. Example: "I was willing to help you with the project, but not then, as I had other commitments."
✓ Grammatically correct
News & Media
Wiki
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
15 human-written examples
But not then.
News & Media
Designers today are encouraged to be expressive, but not then.
News & Media
Many weeks later, that would be true, but not then.
News & Media
"There's a time to study, but not then," she said.
News & Media
I would be now, probably, but not then.
News & Media
We're now used to seeing Messi dribble past six players, but not then.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
45 human-written examples
But if not, then not".
News & Media
But no, not then.
News & Media
But, if not, then what is it?
News & Media
But why not, then, a fatty-foods tax?
News & Media
But if not, then it's sloppy scheduling".
News & Media
Expert writing Tips
Best practice
Use "but not then" to clearly contrast a past situation with the present or a future possibility. This helps to avoid ambiguity and makes your writing more precise.
Common error
Avoid using "but not then" in very simple sentences where a more direct contrast can be made. For example, instead of "I wanted to go, but not then", consider "I wanted to go later."
Source & Trust
86%
Authority and reliability
4.1/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "but not then" functions as an adverbial phrase that introduces a contrasting temporal element. It specifies that a particular condition or action was not applicable or did not occur at a certain point in the past. As noted by Ludwig, this usage is grammatically correct.
Frequent in
News & Media
60%
Wiki
20%
Academia
10%
Less common in
Science
5%
Formal & Business
5%
Social Media
0%
Ludwig's WRAP-UP
In summary, the phrase "but not then" serves as a useful tool to express temporal contrast within a sentence. As Ludwig AI confirms, its usage is grammatically correct and is observed across diverse contexts, including news, academic writing, and general discourse. While versatile, its effectiveness is maximized when utilized to create clear distinctions between past scenarios and present or future possibilities. Avoiding overuse in overly simple sentences helps maintain writing clarity. Alternatives like "but not at that time" can offer added formality when required. Ludwig's analysis suggests that mastering "but not then" enables more precise and nuanced communication.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
but not at that time
Replaces "then" with the more explicit "at that time" for added clarity.
but not at that moment
Substitutes "then" with "at that moment", emphasizing a specific instance.
but not in those days
Emphasizes a longer period in the past when something was not the case.
but not during that period
Specifies a broader timeframe when something didn't occur.
but not under those circumstances
Focuses on the specific conditions that made something inapplicable.
but that wasn't the situation then
Rephrases to focus on the situation being different at that time.
however, that wasn't the case at the time
A more formal and explanatory way of expressing the same idea.
yet, it wasn't so then
Uses "yet" and inverts the sentence structure for a slightly different emphasis.
although not at that point
Uses "although" to introduce the contrasting time frame.
but it wasn't like that then
A more conversational and informal way of expressing the idea.
FAQs
How can I effectively use "but not then" in a sentence?
Use "but not then" to clearly indicate a contrast in time. For example, "I considered investing in the company last year, but not then, as their financial situation was unstable."
What's a formal alternative to "but not then"?
A more formal alternative would be "but not at that time" or "however, that was not the case at the time". For instance, "The technology wasn't available initially; however, that was "not the case at the time"".
Is it grammatically correct to start a sentence with "But not then"?
While grammatically permissible, starting a sentence with "But not then" can sound abrupt. It's often better to include it within the sentence for smoother flow. For example, "I planned to travel, but "not then"; I had other obligations".
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
4.1/5
Expert rating
Real-world application tested