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Justyna Jupowicz-Kozak

CEO of Professional Science Editing for Scientists @ prosciediting.com

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I do know that

Grammar usage guide and real-world examples

USAGE SUMMARY

The phrase "I do know that" is correct and usable in written English.
You can use it to emphasize your awareness or certainty about a particular fact or situation. Example: "I do know that the meeting is scheduled for tomorrow, despite what others may think."

✓ Grammatically correct

News & Media

Formal & Business

Science

Human-verified examples from authoritative sources

Exact Expressions

54 human-written examples

I do know that.

But as a pedant, I do know that Google exists.

But everybody can't sing – I do know that!

And yes, I do know that is a cliché.

News & Media

The New York Times

I do know that fighting is a very minimal part of the sport nowadays.

News & Media

The New York Times

Connick: I do know that!

News & Media

Huffington Post

"I do know that there's injustice".

News & Media

The New York Times
Show more...

Human-verified similar examples from authoritative sources

Similar Expressions

4 human-written examples

RF: I do know that fashion is not about conformity.

News & Media

Forbes

I do know that without me, Twitter wouldn't exist".

DeVOS: I do know that.

SANDERS: I do know that it was mentioned.

Expert writing Tips

Best practice

Use "I do know that" to add emphasis to a statement when you want to highlight your certainty or knowledge, especially when there might be doubt or disagreement. For example: "While others might be unsure, "I do know that" the report is accurate."

Common error

Avoid using "I do know that" too frequently, as it can make your writing sound repetitive or defensive. Opt for simpler alternatives like "I know that" or "I am aware that" in most cases to maintain clarity and conciseness.

Antonio Rotolo, PhD - Digital Humanist | Computational Linguist | CEO @Ludwig.guru

Antonio Rotolo, PhD

Digital Humanist | Computational Linguist | CEO @Ludwig.guru

Source & Trust

88%

Authority and reliability

4.1/5

Expert rating

Real-world application tested

Linguistic Context

The phrase "I do know that" functions as a declarative statement with added emphasis. The auxiliary verb "do" reinforces the speaker's certainty or awareness of a particular fact or situation. Ludwig AI confirms this through the provided examples.

Expression frequency: Uncommon

Frequent in

News & Media

66%

Formal & Business

16%

Science

16%

Less common in

Encyclopedias

0%

Wiki

0%

Reference

0%

Ludwig's WRAP-UP

"I do know that" is a phrase used to emphatically assert one's knowledge or certainty about a particular fact. It functions grammatically as a declarative statement with added emphasis, as confirmed by Ludwig. While grammatically correct and usable, Ludwig examples show that overusing it can make writing sound repetitive, so it's best reserved for situations where you want to strongly emphasize your awareness. The phrase appears most frequently in news and media contexts and has a neutral register. Alternatives include "I am certain that" or "I am aware that", which offer similar meanings with slight variations in emphasis.

FAQs

How can I use "I do know that" in a sentence?

"I do know that" is used to emphasize your knowledge of something. For example, ""I do know that" the deadline is tomorrow, so we need to finish the report today."

What can I say instead of "I do know that"?

You can use alternatives like "I am aware that", "I am certain that", or "I am sure that" depending on the context. These phrases convey a similar meaning with slightly different nuances.

Is it grammatically correct to say "I do know that"?

Yes, it is grammatically correct. The "do" is used for emphasis. Without the "do", the sentence "I know that" is also correct, but lacks the added emphasis.

What's the difference between "I know that" and "I do know that"?

The addition of "do" in ""I do know that"" emphasizes the speaker's certainty or awareness. "I know that" simply states a fact, while ""I do know that"" underscores the speaker's conviction.

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Source & Trust

88%

Authority and reliability

4.1/5

Expert rating

Real-world application tested

Most frequent sentences: