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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
this is so
Grammar usage guide and real-world examplesUSAGE SUMMARY
"this is so" is correct and usable in written English.
You can use this phrase when expressing a feeling of agreement with the sentiment of the sentence prior. For example: "Bob is the best player on the team." "This is so!".
✓ Grammatically correct
News & Media
Academia
Science
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
60 human-written examples
"This is so nice".
News & Media
This is so devastating".
News & Media
"This is so disappointing.
News & Media
This is so exciting.
News & Media
Perhaps this is so.
News & Media
This is so.
News & Media
This is so unfair.
News & Media
"This is so fundamental.
News & Media
This is so stressful.
News & Media
This is so terrible?
News & Media
This is so cool".
News & Media
Expert writing Tips
Best practice
Vary your expressions of agreement by using alternatives like "that's so true" or "exactly" to avoid repetition.
Common error
Avoid using "this is so" in highly formal or professional settings where a more sophisticated expression of agreement or sentiment might be more appropriate. Consider alternatives such as "I concur" or "that is indeed the case".
Source & Trust
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "this is so" primarily functions as an exclamatory response, expressing agreement, excitement, or strong emotion. It's often used to affirm a previous statement or observation, as demonstrated in the Ludwig examples.
Frequent in
News & Media
38%
Academia
23%
Wiki
10%
Less common in
Science
15%
Formal & Business
14%
Reference
0%
Ludwig's WRAP-UP
In summary, the phrase "this is so" is a grammatically correct and versatile expression used to convey agreement, excitement, or strong emotion. Ludwig AI analysis confirms that it is most frequently found in news and media contexts, followed by academic and wiki sources. While generally informal, its suitability depends on the context, with more formal alternatives preferred in professional settings. To enhance your writing, consider substituting "this is so" with phrases like "that's so true" or "exactly" to avoid repetition and maintain a varied tone.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
you're absolutely right
Directly agrees with the person speaking, confirming their accuracy.
that's so true
Emphasizes agreement or confirmation of a statement.
that's absolutely right
Emphasizes the correctness of a statement with absolute certainty.
that's very true
Similar to "that's so true" but with a slightly different emphasis.
that's definitely right
Affirms the correctness of a statement with certainty.
it is indeed
Confirms a previous statement with a formal tone.
i agree completely
Expresses full agreement with a preceding statement.
i couldn't agree more
Expresses strong agreement, indicating that one fully concurs.
precisely
A concise way of expressing exact agreement.
exactly
A shorter, more emphatic way of saying "precisely."
FAQs
How can I use "this is so" in a sentence?
Use "this is so" to express agreement, excitement, or strong emotion in response to something that has just been said or observed. For example, if someone says "This movie is amazing", you could reply, "This is so!".
What can I say instead of "this is so"?
You can use alternatives like "that's so true", "exactly", or "I agree completely" depending on the context.
Is it appropriate to use "this is so" in formal writing?
While grammatically correct, "this is so" is generally considered informal and may not be suitable for formal writing. Consider more formal alternatives like "that is indeed the case".
What's the difference between "this is so" and "that is so"?
"This is so" and "that is so" are essentially interchangeable in most contexts. The choice often comes down to personal preference or the flow of the sentence.
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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
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested