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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
I vow that
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "I vow that" is correct and usable in written English.
You can use it when making a solemn promise or commitment, often in a formal or serious context. Example: "I vow that I will always stand by you, no matter the circumstances."
✓ Grammatically correct
News & Media
Formal & Business
Alternative expressions(20)
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
12 human-written examples
I vow that if I ever get nominated again I'll be doing it in front of the telly with a take-out curry.
News & Media
And I vow that during the period in which I am assuming this responsibility to respect the constitution and carry out the political, economic and social reforms that were announced.
News & Media
"And I vow that you shall always have a place by my hearth, and meat and mead at my table, and I pledge to ask no service of you that might bring you dishonor".
News & Media
Her flat is lovely, and I vow that if I ever have a place I'm allowed to paint, I'll opt for similarly mood-lifting colours: bright green walls; an orange bathroom with deep blue tiles.
News & Media
In 1959, after completing a more modest translation on which she had collaborated, she wrote to a friend, "I vow that this is the last translation I shall agree to let him do as long as I live!" There were still five years of work to be done on "Eugene Onegin".
News & Media
I vow that this relationship is not a drive-by.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
47 human-written examples
"I vowed that nobody would silence me," Ms. Katz said.
News & Media
I vowed that would never be a problem".
News & Media
I vowed that one day I would buy them whatever they wanted".
News & Media
I vowed that before I left here I would paint it up and make it a little more cheerful".
News & Media
When I finished that book I vowed that whatever I did next, I would have the freedom to approach portions of the book in different ways.
News & Media
Expert writing Tips
Best practice
Use "I vow that" when you want to express a deeply felt commitment or promise. It adds a sense of gravity and personal investment to your statement.
Common error
Avoid using "I vow that" in everyday, trivial situations. Its solemn tone can sound overly dramatic or insincere if used inappropriately. Reserve it for moments that genuinely warrant a serious declaration.
Source & Trust
89%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "I vow that" functions as a declarative expression, used to make a firm and solemn promise or commitment. As Ludwig indicates, it's considered grammatically correct. The phrase introduces a statement of intention, conveying a sense of personal investment and determination.
Frequent in
News & Media
60%
Formal & Business
25%
Science
5%
Less common in
Encyclopedias
2%
Wiki
2%
Reference
1%
Ludwig's WRAP-UP
In summary, "I vow that" is a versatile phrase used to express a solemn promise or commitment. Ludwig confirms its grammatical correctness, and examples show it appearing most frequently in News & Media and Formal & Business contexts. When using this phrase, consider the level of formality appropriate for the situation to avoid sounding overly dramatic. For similar expressions, you might consider "I promise that" or "I pledge that". Remember that according to Ludwig this phrase can also be employed in other expressions with less frequency.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
I promise that
Is a common and direct way to express a commitment.
I pledge that
Offers a slightly more formal and emphatic alternative to "vow".
I solemnly swear that
Adds a heightened sense of formality and seriousness through the use of "solemnly swear".
I swear on my honor that
Signifies a very serious and deeply personal promise, often involving one's reputation.
I give my word that
Provides a more personal and direct assurance or promise.
I give you my assurance that
Emphasizes the reliability and trustworthiness of the promise.
I guarantee that
Implies a stronger level of certainty and assurance about a future outcome.
I assure you that
Conveys a strong sense of certainty and reassurance.
I affirm that
Introduces a declarative statement, emphasizing truth and conviction.
I declare that
Offers a formal and public declaration of intent or belief.
FAQs
What does "I vow that" mean?
The phrase "I vow that" signifies a solemn promise or commitment. It indicates a firm intention to fulfill a particular action or uphold a certain principle.
When is it appropriate to use "I vow that"?
Use "I vow that" when you want to convey a strong sense of commitment and seriousness. It's suitable for formal declarations, heartfelt promises, or moments where a significant pledge is being made.
What can I say instead of "I vow that"?
You can use alternatives like "I promise that", "I pledge that", or "I solemnly swear that" to express a firm commitment.
Is "I vow that" formal or informal?
The phrase "I vow that" leans toward the formal side, carrying a sense of solemnity and deep commitment. It's less casual than a simple promise and more suited for serious occasions.
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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
89%
Authority and reliability
4.5/5
Expert rating
Real-world application tested