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Justyna Jupowicz-Kozak

CEO of Professional Science Editing for Scientists @ prosciediting.com

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completely sure

Grammar usage guide and real-world examples

USAGE SUMMARY

"completely sure" is a correct and usable phrase in written English.
It can be used to emphasize the degree of certainty in a situation. For example: "I'm completely sure I can finish the project before the deadline."

✓ Grammatically correct

News & Media

Academia

Wiki

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

DJ MikeQ: I mean, I'm not completely sure.

News & Media

Huffington Post

"I'm completely sure".

News & Media

The New Yorker

I'm not completely sure why.

I'm not completely sure what happened, though".

News & Media

The New Yorker

Doctors aren't completely sure why melanoma rates are soaring.

I'm not completely sure where I am now".

"I'm completely sure most people support it," he said.

News & Media

The New York Times

I thought I saw him, but I'm not completely sure.

News & Media

The New York Times

But Ford itself never seemed completely sure of the concept.

News & Media

The New York Times

"But they all looked completely sure about their power.

News & Media

The New Yorker

They were both completely sure of what they looked like".

Show more...

Expert writing Tips

Best practice

Use "completely sure" when you want to strongly emphasize your certainty about something. It adds more weight than simply saying "sure".

Common error

Avoid using "completely sure" in every sentence where you express certainty. Vary your language with synonyms like "absolutely certain" or "entirely convinced" to maintain reader engagement.

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

Antonio Rotolo, PhD

Digital Humanist | Computational Linguist | CEO @Ludwig.guru

Source & Trust

80%

Authority and reliability

4.5/5

Expert rating

Real-world application tested

Linguistic Context

The phrase "completely sure" functions as an adjectival phrase that modifies a subject. It is used to express a strong degree of certainty or conviction. Ludwig provides numerous examples of its usage in various contexts, indicating its widespread applicability.

Expression frequency: Very common

Frequent in

News & Media

35%

Academia

25%

Wiki

20%

Less common in

Science

10%

Formal & Business

5%

Reference

5%

Ludwig's WRAP-UP

In summary, "completely sure" is a versatile adjectival phrase used to express a strong sense of certainty across a variety of contexts. As Ludwig AI confirms, it is grammatically correct and widely used, particularly in News & Media, Academia, and Wiki sources. While highly effective for conveying conviction, it's important to vary your language with alternatives like "absolutely certain" or "entirely convinced" to avoid overuse. Mastering the proper usage of "completely sure" and its synonyms will enhance the clarity and impact of your writing.

FAQs

What does "completely sure" mean?

The phrase "completely sure" means you are entirely certain about something, leaving no room for doubt. It's a stronger way of saying you are "sure".

How can I use "completely sure" in a sentence?

You can use "completely sure" to express strong conviction. For example: "I am completely sure I locked the door" or "She seemed completely sure of her answer".

What are some alternatives to "completely sure"?

You can use alternatives like "absolutely certain", "entirely convinced", or "without a doubt" depending on the context.

Is there a difference between "completely sure" and "quite sure"?

"Completely sure" implies a higher degree of certainty than "quite sure". While "quite sure" suggests a reasonable level of confidence, "completely sure" leaves no room for doubt.

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Source & Trust

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Authority and reliability

4.5/5

Expert rating

Real-world application tested

Most frequent sentences: