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Justyna Jupowicz-Kozak

CEO of Professional Science Editing for Scientists @ prosciediting.com

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I sure that

Grammar usage guide and real-world examples

USAGE SUMMARY

The phrase 'I sure that' is not correct English.
To express certainty in English, you would need to use the phrase 'I am sure that'. For example: I am sure that the next day will be a beautiful day.

⚠ May contain grammatical issues

News & Media

Science

Human-verified examples from authoritative sources

Exact Expressions

10 human-written examples

Am I sure that this is the right story?

News & Media

The New York Times

Was I sure that this man was my father?

News & Media

The New Yorker

But nor am I sure that Desmond believed he was lying when he told me otherwise.

News & Media

The Guardian

Nor am I sure that Plath's work can be separated from her depression.

Am I sure that he's not in the Russian Mafia, someone else asked.

News & Media

The Guardian

Valcke said: "Am I sure that 2018 and 2022 are free of any collusion?

Show more...

Human-verified similar examples from authoritative sources

Similar Expressions

50 human-written examples

I'm sure that's what I was doing.

News & Media

The New York Times

And I thought, Sure, that's what I love.

News & Media

The New Yorker

"I'm sure that wasn't me," I said.

News & Media

The New York Times

"I'm sure that wasn't it".

News & Media

The New Yorker

I'm sure that's true.

News & Media

The New Yorker
Show more...

Expert writing Tips

Best practice

When aiming for a formal tone, consider alternatives like "I am certain that" or "I am convinced that" instead of the more casual "I am sure that".

Common error

Ensure that the verb "to be" is included when expressing a state of being or certainty. Saying just "I sure that" is like saying "I happy" - it misses the necessary linking verb.

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

Antonio Rotolo, PhD

Digital Humanist | Computational Linguist | CEO @Ludwig.guru

Source & Trust

89%

Authority and reliability

2.8/5

Expert rating

Real-world application tested

Linguistic Context

The phrase "I sure that" is an incorrect attempt to express certainty or conviction. Correctly, it requires the auxiliary verb 'am' to form a complete sentence. As Ludwig AI states, the correct form should be 'I am sure that'.

Expression frequency: Uncommon

Frequent in

News & Media

40%

Science

30%

Formal & Business

10%

Less common in

Academia

5%

Encyclopedias

5%

Wiki

10%

Ludwig's WRAP-UP

The phrase "I sure that" is grammatically incorrect, as it omits the necessary auxiliary verb "am". The proper way to express certainty is by saying "I am sure that". As Ludwig AI points out, without "am", the sentence fails to properly convey its intended meaning. While "I sure that" might appear in informal contexts, it is crucial to use the grammatically correct "I am sure that" in formal writing and professional communication. There are alternative ways to express confidence or belief, such as "I am certain that" or "I believe that", depending on the intended nuance.

FAQs

What is the correct way to say "I sure that"?

The correct way to express certainty is to use the phrase "I am sure that". The auxiliary verb "am" is required for proper grammar.

What are some alternatives to "I am sure that"?

You can use alternatives like "I am certain that", "I am positive that", or "I believe that" depending on the context and the level of certainty you want to express.

Is "I sure that" ever acceptable in writing?

No, "I sure that" is generally not acceptable in formal or academic writing. It is considered grammatically incorrect. While it might appear in informal speech, it should be avoided in written communication. Always use "I am sure that" instead.

What's the difference between "I am sure that" and "I am certain that"?

While both phrases express certainty, "I am certain that" often implies a stronger level of conviction than "I am sure that". They can often be used interchangeably, but consider the nuance when choosing the most appropriate phrase.

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Source & Trust

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Authority and reliability

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Expert rating

Real-world application tested

Most frequent sentences: