know that

USAGE SUMMARY

"know that" is correct and usable in written English.
You can use it to introduce a fact or assumption that is either known by the speaker or being assumed. For example: "I know that you don't like to talk about it, but we need to discuss the issue."

✓ Grammatically correct

News & Media

Wiki

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

"People don't know that.

The New York Times

I don't know that.

The New York Times - Sports

"You don't know that.

The New York Times - Magazine

She didn't know that.

The New Yorker

I well know that.

Forbes

You can't know that.

Forbes

Just know that.

WikiHow

Think that, know that.

WikiHow

Let him know that.

WikiHow

Let them know that.

WikiHow

Know that.

The New Yorker

Expert writing Tips

Best practice

Use "know that" to introduce a fact or assumption that is either known by the speaker or generally accepted. For example: "I "know that" this is a difficult decision, but it's necessary."

Common error

Avoid using "know that" excessively in formal writing. While grammatically correct, it can sometimes make your writing sound less sophisticated. Opt for synonyms like "be aware that" or "understand that" to maintain a more professional tone.

Linguistic Context

The phrase "know that" functions as a connector introducing a clause expressing something the speaker or writer believes to be a fact or truth. As Ludwig AI confirms, it's a correct and usable phrase. Examples from Ludwig show its use in conveying information the speaker expects the audience to already grasp.

Expression frequency: Very common

Frequent in

News & Media

70%

Wiki

15%

Formal & Business

5%

Less common in

Science

5%

Encyclopedias

3%

Reference

2%

Ludwig's WRAP-UP

In summary, the phrase "know that" is a grammatically sound and frequently employed expression used to introduce a fact, assumption, or piece of information believed to be true. As Ludwig AI confirms, it's considered correct and usable. Its versatility makes it suitable for various contexts, although overuse in formal writing should be avoided. Alternatives such as "be aware that" or "understand that" can provide a more sophisticated tone when necessary. With primary usage in News & Media, confirmed by Ludwig's examples, you can feel confident in using "know that" across your writing.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

be aware that

Replaces "know" with a more formal synonym, emphasizing a state of awareness.

understand that

Focuses on comprehension and grasping the meaning or implications of something.

realize that

Highlights the process of coming to a certain understanding or awareness.

recognize that

Implies acknowledging or identifying something as true or valid.

bear in mind that

Suggests keeping something in consideration, often as a reminder.

take note that

Emphasizes the importance of paying attention to a particular detail or fact.

keep in mind that

Similar to 'bear in mind', advising someone not to forget something important.

it is known that

Presents the information as a widely accepted or established fact.

it is understood that

Suggests a mutual agreement or common understanding about something.

take it as a given that

Indicates accepting something as a fundamental truth or assumption without further proof.

FAQs

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

You can use "know that" to introduce a fact or assumption. For example: "I "know that" you are tired, but we need to finish this project."

What can I say instead of "know that"?

You can use alternatives like "be aware that", "understand that", or "realize that" depending on the context.

Is it okay to start a sentence with "know that"?

While grammatically acceptable, starting a sentence with "know that" can sometimes sound informal. Consider rephrasing for a smoother flow, especially in formal writing. For example, instead of "Know that you have options", you could say "Be aware that you have options".

What is the difference between "know that" and "know of"?

"Know that" introduces a fact, while "know of" indicates familiarity with something. For example, "I "know that" the meeting is tomorrow" means I am aware of the meeting's date. "I "know of" the company" means I am familiar with the company's existence or reputation.