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
I checked that
Grammar usage guide and real-world examplesUSAGE SUMMARY
"I checked that" is a perfectly correct and usable phrase in written English.
You can use it any time you want to express that you have done some kind of evaluation or examination of something. For example: "I checked that all the details were correct before submitting the application."
✓ Grammatically correct
News & Media
Science
Alternative expressions(20)
I verified that
I confirmed that
I made sure that
I ascertained that
I investigated that
I examined that
I ensured that
I looked into that
I determined that
I established that
I validated that
I guaranteed that
I swore that
I discovered that
I saw to it that
I selected that
I detected that
I watched that
I chose that
I picked that
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
38 human-written examples
I checked that out right away".
News & Media
Last I checked that was a GOOD thing.
News & Media
I checked that possibility out, and it doesn't hold water.
News & Media
"I checked that board more than my e-mail.
News & Media
I checked that everyone in my group was OK.
News & Media
I checked that impulse and cut scenes that had them.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
22 human-written examples
What do you listen to at home? A. Trey Songz and J. Cole — I check that type of stuff, it's an islandy type of vibe.
News & Media
Stop asking me if I've checked that OKCupid account that you made for me.
News & Media
"MENTAL as in I went and checked that gutter out last summer specifically," he says.
News & Media
MRS. CLAUS: I thought you already checked that list.
News & Media
I'm glad we checked that off.
News & Media
Expert writing Tips
Best practice
When writing formally, consider using synonyms like "verified" or "confirmed" to maintain a professional tone.
Common error
While "I checked that" is acceptable, excessive use can make your writing sound repetitive. Vary your language by using synonyms such as "I verified", "I confirmed", or "I ensured" to maintain reader engagement.
Source & Trust
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "I checked that" functions as a statement of verification. It indicates that the speaker has performed an action to confirm or validate a piece of information, a condition, or a status. Ludwig's examples demonstrate this usage across diverse contexts.
Frequent in
News & Media
63%
Science
19%
Formal & Business
6%
Less common in
Encyclopedias
0%
Wiki
0%
Social Media
0%
Ludwig's WRAP-UP
In summary, "I checked that" is a versatile phrase used to convey that a verification process has been performed. As verified by Ludwig, it's grammatically sound and suitable for various contexts, though more formal synonyms may be preferred in certain professional settings. While primarily found in news and media, its application extends to science and general discourse. To avoid redundancy, consider using alternatives like "I verified that" or "I confirmed that". The most common error is overuse in formal writing, where varied phrasing is beneficial.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
I verified that
Replaces "checked" with a more formal synonym, emphasizing confirmation of accuracy.
I confirmed that
Similar to "verified", but can also imply strengthening or validating something.
I made sure that
Focuses on ensuring something is correct or complete, rather than a simple check.
I ascertained that
A more formal and precise way of saying you found something out for certain.
I looked into that
Suggests a more thorough investigation than a simple check.
I investigated that
Implies a formal or systematic examination or research.
I examined that
Emphasizes a careful and detailed inspection.
I determined that
Focuses on reaching a conclusion after investigation or calculation.
I established that
Implies a firm or definitive conclusion.
I validated that
Highlights the process of proving something is sound or effective.
FAQs
What can I say instead of "I checked that"?
You can use alternatives like "I verified that", "I confirmed that", or "I made sure that" depending on the context.
Is "I checked that" suitable for formal writing?
While grammatically correct, "I checked that" may sound informal in certain contexts. Consider using more formal alternatives like "I ascertained that" or "I verified that" for a more professional tone.
How can I emphasize the thoroughness of my check?
If you want to emphasize the depth of your examination, consider using phrases like "I investigated that" or "I examined that" instead of "I checked that".
What's the difference between "I checked that" and "I ensured that"?
"I checked that" simply means you verified something. "I ensured that" implies you took action to guarantee a certain outcome or condition. For instance, "I checked that the door was locked" versus "I ensured that the door was locked" (meaning you may have locked it yourself).
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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