I am certain of

USAGE SUMMARY

"I am certain of" is a correct and usable phrase in written English.
It can be used to express that someone is specifically confident in something, or to emphasize the importance of something. For example: "I am certain of my success in the upcoming exams."

✓ Grammatically correct

News & Media

Science

Human-verified examples from authoritative sources

Exact Expressions

46 human-written examples

I am certain of one thing.

The Guardian

What I am certain of is that literature is a way of trying to.

The Guardian - Books

What I am certain of is that fusion developed a bad reputation not long afterward.

The New York Times

One thing I am certain of is that they serve some purpose.

The New York Times

There are only two things I am certain of in this election.

The Guardian - Opinion

All I am certain of is that Larry, our school star, disappeared from my ken as though swallowed up.

The New Yorker

Human-verified similar examples from authoritative sources

Similar Expressions

14 human-written examples

"I'm certain of that".

The New York Times

I'm certain of it".

The Guardian

Oh, I'm certain of it!

The Guardian - Sport

I'm certain of what I'm saying.

The New York Times - Sports

But I'm certain of Picholine's charms.

The New York Times - Food

Expert writing Tips

Best practice

Use "I am certain of" to express a strong conviction or belief based on evidence or experience. It adds weight to your statement.

Common error

Avoid using "I am certain of" repeatedly in a single piece of writing, as it can make your tone sound overly assertive or repetitive. Instead, vary your language with synonyms like "I am sure", "I am convinced", or "I have no doubt".

Linguistic Context

The phrase "I am certain of" functions as a declarative statement expressing a high degree of confidence or assurance. According to Ludwig AI, this is correct and usable in written English. Examples in Ludwig showcase its use in various contexts to emphasize conviction.

Expression frequency: Very common

Frequent in

News & Media

64%

Science

20%

Formal & Business

6%

Less common in

Encyclopedias

0%

Wiki

8%

Reference

2%

Ludwig's WRAP-UP

In summary, the phrase "I am certain of" is a grammatically sound and frequently employed expression used to convey a strong sense of confidence or assurance. According to Ludwig AI, it is correct and usable in written English. It is most often found in News & Media, Science, and Formal & Business contexts. To avoid sounding repetitive, consider employing synonyms like "I am sure of" or "I have no doubt about". When using "I am certain of", make sure to express a strong conviction based on either facts or experience to strengthen your message.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

I am sure of

Replaces "certain" with "sure", indicating a slightly less formal tone while maintaining a high degree of confidence.

I am absolutely sure that

Adds "absolutely" to intensify the feeling of certainty.

I am positive about

Substitutes "certain" with "positive", emphasizing an optimistic and confident outlook.

I have no doubt about

Uses a double negative to express certainty, implying a complete lack of uncertainty.

I am convinced that

Replaces "certain of" with "convinced that", shifting the focus to a state of having been persuaded or assured.

I know for a fact that

Emphasizes that the knowledge is based on concrete evidence or direct experience.

It is my firm belief that

Introduces a more formal and emphatic declaration of belief.

I firmly believe

Concise assertion of strong conviction, omitting the prepositional phrase.

I can guarantee

Expresses certainty through a promise or assurance.

Without a doubt

Expresses certainty in an assertive and concise manner.

FAQs

What does "I am certain of" mean?

The phrase "I am certain of" expresses a strong feeling of confidence or assurance about something. It indicates that the speaker has no doubts about the truth or validity of a particular statement or belief.

What can I say instead of "I am certain of"?

You can use alternatives like "I am sure of", "I am positive about", or "I have no doubt about" depending on the context.

Is "I am certain of" formal or informal?

The phrase "I am certain of" is generally considered neutral in tone and can be used in both formal and informal contexts. However, it's more common in written communication than in casual speech.

How to use "I am certain of" in a sentence?

You can use "I am certain of" followed by a noun phrase or a clause. For example, "I am certain of my abilities" or "I am certain that the project will succeed".