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Justyna Jupowicz-Kozak

CEO of Professional Science Editing for Scientists @ prosciediting.com

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sure of what

Grammar usage guide and real-world examples

USAGE SUMMARY

'sure of what' is correct and usable in written English.
You could use it when asking someone to clarify something that was said or to further explain what they mean. For example, "You want to redecorate the house? I'm not sure of what you mean."

✓ Grammatically correct

News & Media

Science

Formal & Business

Wiki

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

We're just not sure of what.

I am not sure of what.

I was pretty sure of what I was doing.

News & Media

The New Yorker

But he needed to be sure — sure of what?

News & Media

The New Yorker

But they were not sure of what they needed.

News & Media

The New York Times

It was accused of being sure of what it was against but less sure of what it was for.

News & Media

Independent

And Sloan was sure of what he was seeing.

You get engaged when you're sure of what you want".

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

It's a hybrid, but I'm not sure of what.

I'm not really sure of what I want".

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Expert writing Tips

Best practice

Use "sure of what" to express confidence or certainty regarding a specific matter. For instance, "Before investing, be sure of what your goals are."

Common error

Avoid using "sure of what" when a more direct statement of certainty is possible. For example, instead of saying "I'm sure of what I saw," it's clearer to say "I'm certain I saw it."

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

Antonio Rotolo, PhD

Digital Humanist | Computational Linguist | CEO @Ludwig.guru

Source & Trust

82%

Authority and reliability

4.5/5

Expert rating

Real-world application tested

Linguistic Context

The phrase "sure of what" functions as a prepositional phrase that modifies a verb or adjective, indicating a state of certainty or confidence about a specific thing or action. It adds detail by specifying the object of one's certainty. Ludwig AI confirms its common and correct usage.

Expression frequency: Very common

Frequent in

News & Media

50%

Science

20%

Wiki

15%

Less common in

Formal & Business

10%

Encyclopedias

3%

Social Media

2%

Ludwig's WRAP-UP

In summary, the phrase "sure of what" is a grammatically sound and commonly used prepositional phrase that expresses certainty or confidence about a particular thing or action. As verified by Ludwig AI, this expression is appropriate across a range of contexts, from news and media to scientific and formal business writing. When using "sure of what", it's important to ensure clarity and avoid unnecessary indirectness, opting for more direct statements when possible. Consider alternatives like "certain about what" or "confident in what" to achieve the desired nuance. Finally, remember to be specific about the object of your certainty to provide clear and effective communication.

FAQs

How can I use "sure of what" in a sentence?

You can use "sure of what" to express a lack of doubt or uncertainty about something. For example, "Are you "certain of what" you're doing?" or "I want to be "positive of what" the test results will be before telling anyone."

What's the difference between "sure of what" and "sure about what"?

While both phrases convey certainty, "sure of what" often refers to specific knowledge or understanding, whereas "sure about what" can be used more broadly. For example, you might be "sure of what" the instructions say, but "sure about what" your overall goals are.

What can I say instead of "sure of what"?

You can use alternatives like "certain about what", "confident in what", or "convinced of what" depending on the context.

Is it always necessary to use "sure of what"?

No, sometimes a more direct statement of certainty is preferable. For example, instead of "I am sure of what I need", you could say "I know what I need" to be more concise.

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Source & Trust

82%

Authority and reliability

4.5/5

Expert rating

Real-world application tested

Most frequent sentences: