I know completely

USAGE SUMMARY

The phrase "I know completely" is grammatically correct and can be used in written English.
It can be used to express full understanding or knowledge about a particular subject or situation. Example: "After reviewing all the materials, I can confidently say that I know completely how the system operates."

✓ Grammatically correct

News & Media

Science

Human-verified examples from authoritative sources

Exact Expressions

2 human-written examples

I know: completely unacceptable.

The New York Times

These debates leave me, and many other otherwise progressive mothers I know, completely cold.

The Guardian - Opinion

Human-verified similar examples from authoritative sources

Similar Expressions

58 human-written examples

One student I knew, completely addicted to ketamine which happens to be a corrosive alkali, had developed stomach ulcers that had him doubled over with pain.

The Guardian

And I don't know completely whether in August or September that I'd be able to continue.

The New York Times

I won't know completely until tomorrow night".

The New York Times - Sports

"I guess you never know completely… they are very subtle small changes that I've made but I mean I have not had another crisis point since then so it looks as if it would be down to that".

BMC Health Services Research

I got involved in business, and I know it completely changed my mind-set".

The New York Times - Sports

And I'd just stand there lamely, going, "No, I know, I completely get that — I was actually just thinking that".

The New Yorker

I know, and completely accept, that Amref's priority is the prevention of disease - hence clean water and the distribution of malaria nets.

The Guardian

"The depth of relationship you go into – it's more intense than any other process that I know; it completely transcends gender, age, nationality.

The Guardian - Film

"I know girls completely different - mature and adult," she said.

BBC

Expert writing Tips

Best practice

Use "I know completely" when you want to emphasize a thorough understanding or acceptance of something. It conveys a sense of certainty and comprehension.

Common error

Avoid using "completely" too frequently in your writing. Overuse can make your writing sound repetitive. Vary your language with synonyms like 'fully', 'thoroughly', or 'entirely'.

Linguistic Context

The phrase "I know completely" functions primarily as a declarative statement, asserting the speaker's full understanding or awareness. This aligns with Ludwig's identification of the phrase as grammatically correct and usable in written English.

Expression frequency: Uncommon

Frequent in

News & Media

67%

Science

33%

Formal & Business

0%

Less common in

Encyclopedias

0%

Wiki

0%

Reference

0%

Ludwig's WRAP-UP

In summary, the phrase "I know completely" is a grammatically correct and usable expression to convey a thorough understanding or awareness. While Ludwig identifies it as correct, its frequency is uncommon. It is most often found in news and media contexts. For increased emphasis or formality, alternative phrases such as "I fully understand" or "I am completely aware" can be considered. Using "completely" can add emphasis, but should not be overused to avoid repetition.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

I fully understand

Replaces "know" with "understand" and adds the adverb "fully" to emphasize comprehension.

I thoroughly understand

Similar to 'I fully understand', but uses 'thoroughly' to convey a deeper, more comprehensive level of understanding.

I completely understand

Emphasizes total understanding using the adverb "completely".

I am fully aware

Replaces "know" with "aware", suggesting knowledge of a situation or fact.

I am entirely aware

Uses "entirely" instead of "completely" to emphasize the extent of awareness.

I am completely certain

Shifts focus from knowledge to certainty about something.

I am entirely convinced

Highlights conviction and belief, rather than just knowledge.

I wholeheartedly agree

Indicates strong agreement, implying full understanding and acceptance.

I am in complete agreement

Expresses full agreement on a specific matter or topic.

I grasp it fully

Uses the verb 'grasp' to indicate understanding, making it slightly less formal.

FAQs

What does "I know completely" mean?

The phrase "I know completely" signifies a full and thorough understanding or awareness of a particular subject or situation. It indicates certainty and comprehension.

What are some alternatives to "I know completely"?

You can use alternatives like "I fully understand", "I completely understand", or "I am fully aware" depending on the specific context.

How formal is the phrase "I know completely"?

The phrase "I know completely" is generally considered neutral in formality. It can be used in both formal and informal settings, though more formal alternatives might be preferred in certain contexts.

Is it redundant to say "I know completely"?

While "know" already implies understanding, using "completely" can emphasize the depth and certainty of your knowledge. Whether it's redundant depends on the context and desired level of emphasis.