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 understand is
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "I understand is" is not correct in English and does not convey a clear meaning.
It may be an incomplete thought or a mistake in phrasing, as it lacks a subject or object to complete the idea. Example: "I understand is a complex topic that requires further discussion."
⚠ May contain grammatical issues
News & Media
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
59 human-written examples
That, I understand, is what we were there for.
News & Media
What I understand is that Manchester City will be challenging for the championship.
News & Media
So it actually netted out to what I understand is a one-vote difference.
News & Media
"You know, 'Stardust,' I understand, is the only truly original melody of our time," Merle said.
News & Media
"What means the most, from what I understand, is that he feels good," Derek Jeter said.
News & Media
("All I understand is when Rocky says 'Yo,' " Mr. Stallone said).
News & Media
"We want to include sexual content, which I understand is questionable to certain people," he continued.
News & Media
Empire Online, I understand, is the stock sent to torture me on that point.
News & Media
The borough mayoral role as far as I understand is ceremonial.
News & Media
What I understand is that from now, year after year Manchester City will be challenging for the championship.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
1 human-written examples
Peer editors should give feedback using sentence starters such as "what I understand is…," "what I didn't understand is…" and "what I would like to know more about is…" 4. WRAP-UP/HOMEWORK: Students write their original hybrid story retellings.
News & Media
Expert writing Tips
Best practice
Always follow "I understand" with "that" to introduce a complete clause. For example, use "I understand that the project is delayed" instead of "I understand is the project delayed".
Common error
Avoid using "I understand" without the conjunction "that" when introducing a clause. This omission often leads to grammatically incorrect sentences.
Source & Trust
87%
Authority and reliability
2.8/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "I understand is" functions as an introductory segment in a sentence where the speaker aims to express their comprehension or interpretation of something. However, Ludwig AI marks it as grammatically incorrect because it lacks the necessary conjunction 'that' to properly introduce a clause.
Frequent in
News & Media
70%
Science
15%
Formal & Business
10%
Less common in
Wiki
3%
Encyclopedias
1%
Reference
1%
Ludwig's WRAP-UP
In summary, while the phrase "I understand is" appears frequently in various sources, Ludwig AI identifies it as grammatically incorrect due to the omission of the conjunction "that". Correct alternatives, such as "I understand that", "my understanding is", and "as I understand it", should be used to ensure grammatical accuracy and clarity. Despite its common usage, adhering to proper grammar enhances the credibility and formality of your writing.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
I understand that
Adds the conjunction "that" to create a complete clause, making the sentence grammatically correct.
What I understand is that
Emphasizes the speaker's understanding, adding "What" and "that" for clarity.
My understanding is that
Shifts the focus to the speaker's understanding as a noun phrase.
As I understand it
Indicates the speaker's interpretation or perspective on a situation.
From what I understand
Highlights the source of the speaker's understanding.
It is my understanding that
A more formal way of expressing one's understanding.
I gather that
Implies understanding based on collected information.
I believe that
Indicates a belief based on understanding.
I've come to understand that
Highlights a gradual process of understanding.
I now understand
Emphasizes a current state of understanding.
FAQs
What can I say instead of "I understand is"?
It's better to use phrases like "I understand that", "my understanding is", or "as I understand it" to express comprehension correctly.
Is it grammatically correct to say "I understand is"?
No, "I understand is" is not grammatically correct. The correct phrasing typically includes the conjunction "that", such as "I understand that".
How to use "I understand" in a sentence?
To use "I understand" correctly, follow it with "that" and a complete clause. For example: "I understand that you are busy".
What's the difference between "I understand is" and "I understand that"?
"I understand is" is grammatically incorrect. "I understand that" is the correct way to introduce a clause, making the sentence grammatically sound.
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
87%
Authority and reliability
2.8/5
Expert rating
Real-world application tested