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Justyna Jupowicz-Kozak

CEO of Professional Science Editing for Scientists @ prosciediting.com

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i guarantee that

Grammar usage guide and real-world examples

USAGE SUMMARY

"I guarantee that" is correct and usable in written English.
You can use it as a way of making a firm promise or assurance about something. For example: "I guarantee that I will be ready to leave by 5pm."

✓ Grammatically correct

News & Media

Sports

Opinion

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

I guarantee that will be more popular.

"I guarantee that would probably make it easier to recruit".

News & Media

The New York Times

After one or two very public dismissals, I guarantee that trust, teamwork and confidentiality will prevail.

News & Media

The New York Times

Can I guarantee that?

News & Media

Huffington Post

"I guarantee that will change," Tilden said.

News & Media

Los Angeles Times

And I guarantee that is just the beginning.

News & Media

HuffPost

I guarantee that.

I guarantee that you will love it.

News & Media

The Guardian

"I guarantee that there have been hundreds.

News & Media

The New York Times

I guarantee that there will be no shortage of applicants.

News & Media

The New York Times

"I guarantee that something major will be found," he says.

News & Media

The Guardian
Show more...

Expert writing Tips

Best practice

Use "i guarantee that" to convey a strong sense of certainty and reliability when making a promise or assertion. Ensure that you are in a position to fulfill the guarantee.

Common error

While effective, overuse of "i guarantee that" can diminish its impact and make your writing sound repetitive. Vary your language by using alternatives like "i assure you" or "you can be sure".

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

Antonio Rotolo, PhD

Digital Humanist | Computational Linguist | CEO @Ludwig.guru

Source & Trust

88%

Authority and reliability

4.6/5

Expert rating

Real-world application tested

Linguistic Context

The phrase "i guarantee that" functions as an assertive speech act. It is used to express a strong conviction, promise, or assurance regarding a particular statement or future event. This is supported by Ludwig AI's analysis indicating the phrase is grammatically correct and widely used.

Expression frequency: Very common

Frequent in

News & Media

40%

Sports

25%

Formal & Business

15%

Less common in

Science

10%

Wiki

5%

Reference

5%

Ludwig's WRAP-UP

In summary, "i guarantee that" is a grammatically sound and very common phrase used to express strong assurance or promise. As Ludwig AI confirms, it's widely accepted and employed across diverse contexts, especially in news, sports, and business settings. While effective, varying your language with synonyms like "i assure you that" or "i promise you that" can prevent overuse. Remember to use this phrase responsibly, ensuring you can fulfill the guarantee you are making to maintain credibility. The phrase has a neutral tonality and the communicative purpose is to instill confidence in the listener or reader.

FAQs

When is it appropriate to use "i guarantee that"?

Use "i guarantee that" when you want to express a firm commitment or assurance about a future outcome or present fact. It's suitable when you have a high degree of confidence in the accuracy or reliability of your statement.

What can I say instead of "i guarantee that"?

You can use alternatives like "i assure you that", "i promise you that", or "you can be sure that" depending on the context.

Is "i guarantee that" formal or informal?

"I guarantee that" is generally considered neutral in tone and can be used in both formal and informal settings, though it's important to consider your audience and context. For highly formal situations, "i assure you that" might be more appropriate.

What is the difference between "i guarantee that" and "i hope that"?

"I guarantee that" expresses certainty and a firm commitment, while "i hope that" expresses a desire or wish for something to happen without any assurance of it actually occurring. They convey opposite levels of confidence.

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Source & Trust

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Authority and reliability

4.6/5

Expert rating

Real-world application tested

Most frequent sentences: