really know

USAGE SUMMARY

The phrase "really know" is correct and usable in written English.
You can use it when expressing that you are certain about something or emphasizing that you know something very well. For example, "I really know how to make a delicious lasagna."

✓ Grammatically correct

News & Media

Science

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

"I don't really know.

The New York Times

I couldn't really know.

The New Yorker

He didn't really know.

The New York Times - Health

We really know.

The New Yorker

But you can't really know someone you don't really know.

The New York Times - Magazine

Who could really know?

The New York Times

We cannot really know.

The Guardian - Sport

You never really know.

The New York Times - Sports

"We really know nothing".

The New York Times

We'll never really know.

The New York Times

We will never really know.

Independent

Expert writing Tips

Best practice

Use "really know" to emphasize your certainty or deep understanding of a topic. For example, "I really know this subject matter inside and out."

Common error

Avoid using "really know" excessively in your writing, as it can make your statements sound less impactful. Consider using stronger verbs or more descriptive language to convey your understanding.

Linguistic Context

The phrase "really know" functions as an intensifier to the verb "know", amplifying the degree of certainty or depth of understanding. Ludwig shows examples across various contexts, confirming its grammatical correctness and widespread usage.

Expression frequency: Very common

Frequent in

News & Media

62%

Science

36%

Wiki

2%

Less common in

Formal & Business

0%

Encyclopedias

0%

Social Media

0%

Ludwig's WRAP-UP

The phrase "really know" is a common and grammatically sound way to emphasize the depth of one's understanding or certainty about a subject. As confirmed by Ludwig, this phrase sees frequent use across various domains, including News & Media and Science. It serves to assure the listener or reader of the speaker's expertise or profound understanding. While versatile, be mindful of potential overuse. Consider alternative phrases like "truly understand" or "definitely know" to maintain writing impact and avoid redundancy.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

truly understand

Emphasizes a deeper level of comprehension compared to simply knowing.

genuinely know

Highlights the authenticity and sincerity of one's knowledge.

profoundly understand

Indicates a deep and insightful comprehension of complex matters.

certainly be aware

Focuses on the state of being informed or conscious about something with conviction.

definitely comprehend

Stresses the complete grasp of a concept or situation.

absolutely sure

Highlights the confidence and certainty in one's knowledge or belief.

undoubtedly recognize

Implies an undeniable and clear identification of something or someone.

fully appreciate

Signifies a comprehensive and insightful understanding of something's value or importance.

thoroughly familiar with

Implies a comprehensive knowledge and understanding gained through extensive experience.

intimately acquainted with

Suggests a close and personal familiarity with a subject or person.

FAQs

What does "really know" mean?

The phrase "really know" intensifies the verb "know", emphasizing a deep understanding or certainty about something.

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

You can use "really know" to express confidence or emphasize the depth of your knowledge. For example, "I "truly understand" the intricacies of this subject."

What are some alternatives to "really know"?

Alternatives include "definitely know", "truly understand", or "genuinely know" depending on the context and the level of emphasis you want to convey.

Is it grammatically correct to use "really know"?

Yes, "really know" is grammatically correct. "Really" functions as an adverb modifying the verb "know", indicating the degree or intensity of knowing something.