I know from

USAGE SUMMARY

"I know from" is correct and usable in written English.
The phrase is typically used to indicate the source of the speaker's knowledge. For example, "I know from experience that the best way to succeed is to keep working hard."

✓ Grammatically correct

Science

News & Media

Formal & Business

Human-verified similar examples from authoritative sources

Similar Expressions

60 human-written examples

"Now I know 30.

The Guardian

I know 100 guys like that".

The New York Times

I know 11 people it happened to.

The Guardian - Business

I know 10,000 poems and songs.

The New York Times - Magazine

I know 13-year-old alcoholics, 11-year-old alcoholics.

The Guardian

Next thing I know, 30 minutes have passed.

Harvard Business Review

I know 24 hours can do a lot.

The New York Times - Sports

Although I am not well yet, I know 2 people who ARE well!

Harvard University

I know 30 mph is pretty good but twice is even better.

Massachusetts Institute of Technology

I know 100 per cent that I did the right thing".

Independent

I know 100 per cent I will come through this one".

Independent

Expert writing Tips

Best practice

When using "I know from", clearly specify the source of your knowledge (e.g., "I know from experience", "I know from research", or "I know from reliable sources").

Common error

Avoid using "I know from" without a clear indication of where your knowledge comes from. Saying "I know from somewhere" weakens your statement.

Linguistic Context

The phrase "I know from" serves as an introductory element in a sentence, indicating the source or basis of the speaker's knowledge. It sets the context for the information that follows. Ludwig confirms that it is grammatically correct.

Expression frequency: Missing

Frequent in

Science

0%

News & Media

0%

Formal & Business

0%

Less common in

Science

0%

News & Media

0%

Formal & Business

0%

Ludwig's WRAP-UP

In summary, the phrase "I know from" is a grammatically sound and useful construction for indicating the basis of one's knowledge. Since Ludwig found the phrase correct, using it provides context and credibility to your statements. While examples are currently missing from Ludwig's database, the guidance suggests to always specify the source of information for clarity. Alternatives such as "based on my understanding" or "from my experience" can also be effective depending on the context.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

From my experience

Specifically indicates personal experience as the basis for knowledge.

I've learned that

Indicates knowledge gained through a learning process, whether formal or informal.

What I've observed

Emphasizes knowledge acquired through direct observation.

In my understanding

Similar to "based on my understanding", but slightly less formal.

Based on my understanding

Emphasizes a general understanding as the source of knowledge, rather than direct experience.

Evidence suggests to me

Highlights that available evidence leads to the speaker's conclusion.

According to my knowledge

Highlights the extent of one's familiarity with a subject but does not mention the source of it.

My sources indicate

Suggests information is derived from external sources, not necessarily personal experience.

What I've gathered suggests

Focuses on information collected from various unspecified sources.

As far as I can tell

Implies that the speaker's knowledge is limited to what they have been able to ascertain.

FAQs

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

Use "I know from" to indicate the origin of your knowledge or understanding. For instance, you might say, "I know from experience that hard work pays off" or "I know from reading the news that the economy is improving".

What are some alternatives to "I know from"?

Alternatives include phrases like "based on my understanding", "according to my knowledge", or "from my experience", depending on the specific source of your knowledge.

Is it always necessary to specify the source after "I know from"?

While not always grammatically required, specifying the source after "I know from" significantly enhances the clarity and credibility of your statement. Without it, the statement may lack context and impact.

What's the difference between "I know from experience" and "I learned from experience"?

"I know from experience" implies a current understanding or belief based on past events. "I learned from experience" emphasizes the process of gaining knowledge, often implying a change in perspective.