I am sure

USAGE SUMMARY

The phrase "I am sure" is correct and usable in written English.
You can use it to express confidence or certainty about a statement or situation. Example: "I am sure that we will meet the project deadline if we all work together."

✓ Grammatically correct

News & Media

Science

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

"I am sure".

The New York Times

"I am sure they might".

The New York Times

"I am sure of that".

The New Yorker

I am sure you understand".

Independent

"I am sure of it".

The New York Times

I am sure you do.

The New Yorker

Of that I am sure".

The New York Times - Food

I am sure of this.

The Guardian

"I am sure, totally sure".

The New York Times

I am sure I disagree.

The New York Times

I am sure I'm sleeping.

The New York Times - Sports

Expert writing Tips

Best practice

When expressing certainty, consider your audience. "I am sure" is suitable for both formal and informal settings, but more formal alternatives might be appropriate in certain professional contexts.

Common error

Avoid using "I am sure" when expressing opinions or making predictions that are not based on solid evidence. Overstating your certainty can damage your credibility if proven wrong.

Linguistic Context

The phrase "I am sure" functions as an expression of certainty or conviction. It asserts the speaker's confidence in the truth or validity of a statement. Ludwig AI indicates that the phrase is both grammatically sound and widely employed.

Expression frequency: Very common

Frequent in

News & Media

78%

Science

10%

Formal & Business

6%

Less common in

Encyclopedias

3%

Wiki

2%

Reference

1%

Ludwig's WRAP-UP

In summary, "I am sure" is a versatile phrase used to express certainty or confidence. Ludwig AI confirms its grammatical correctness and widespread usage. It functions to reassure, convince, or emphasize a point, and is appropriate for neutral settings like news and professional communications. While highly frequent, consider using synonyms such as "I am certain" or "I have no doubt" to avoid repetition and maintain engagement. Be cautious about overstating certainty when evidence is lacking to preserve your credibility.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

I am certain

Indicates a strong belief, similar to "I am sure", but can sometimes imply even greater conviction.

I feel certain

Similar to "I am certain", but emphasizes the internal feeling of assurance.

I am confident

Emphasizes assurance and trust in one's abilities or a positive outcome.

I have no doubt

Expresses a lack of uncertainty, conveying a strong sense of conviction.

I am positive

Indicates certainty, often used in informal contexts.

I am convinced

Suggests that one has been persuaded or believes something firmly based on evidence or reasoning.

I truly believe

Highlights the sincerity and depth of one's belief.

I can assure you

Offers a guarantee or reassurance to someone else.

It is my belief

States a personal conviction or opinion.

I am of the opinion

Presents a viewpoint, often in a more formal or considered manner.

FAQs

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

You can use alternatives like "I am certain", "I am confident", or "I have no doubt" depending on the context.

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

"I am sure" is typically followed by a clause indicating what you are certain about. For example, "I am sure that the package will arrive tomorrow" or "I am sure he will understand."

Is "I am sure of" grammatically correct?

Yes, "I am sure of" is grammatically correct. It's often followed by a noun phrase or pronoun, such as "I am sure of my facts" or "I am sure of it."

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

"I am sure" expresses a higher degree of confidence and certainty than "I think". While "I think" suggests an opinion or belief, "I am sure" implies a firm conviction.