he is certain

USAGE SUMMARY

"he is certain" is a correct and usable part of a sentence in written English.
You can use it to describe someone's level of confidence or certainty about a situation, idea, or opinion. For example: "John was determined not to give up, and he was certain of his eventual success."

✓ Grammatically correct

News & Media

Human-verified examples from authoritative sources

Exact Expressions

54 human-written examples

Of this, he is certain.

The New York Times - Sports

He is certain to have taken note.

The Economist

He is certain where Webb is uncertain.

The New York Times - Sports

But of one thing he is certain.

The Guardian

He is certain that new technology will transform business education.

The Economist

He is certain that Copenhagen is the end of negotiations.

The Economist

He is certain that his phones and computers are tapped.

The Economist

And he is certain that he will win.

The New York Times

He is certain to face more of them.

The New York Times

But he is certain that the newspaper remains a target.

The New York Times

But he is certain about a few things.

The New York Times

Expert writing Tips

Best practice

Use "he is certain" to clearly convey a character's or person's strong conviction or assurance, especially in narrative or reporting contexts. Ensure the certainty is justified within the context to maintain credibility.

Common error

Avoid using "he is certain" when there is little or no evidence to support such a strong claim. Overstating certainty can undermine the credibility of your writing. Instead, consider softer alternatives like "he believes" or "he suspects" if the situation warrants it.

Linguistic Context

The phrase "he is certain" functions as an assertion of conviction or assurance. It indicates a high degree of confidence in a statement or belief. As confirmed by Ludwig AI, it's a perfectly usable phrase in written English.

Expression frequency: Very common

Frequent in

News & Media

98%

Science

1%

Formal & Business

1%

Less common in

Wiki

0%

Encyclopedias

0%

Reference

0%

Ludwig's WRAP-UP

In summary, the phrase "he is certain" is a grammatically sound and frequently employed expression used to convey a strong sense of assurance or conviction. Ludwig AI confirms its usability in various writing contexts. Primarily found in News & Media, it indicates a neutral register suitable for formal and informal communication. While alternatives like "he is sure" or "he is convinced" exist, understanding the subtle nuances helps in choosing the most appropriate expression. Remember to use this phrase judiciously, backing up claims with sufficient evidence to maintain credibility.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

he is sure

Replaces "certain" with its direct synonym "sure", maintaining the same grammatical structure and meaning.

he is convinced

Emphasizes a strong belief based on evidence or reasoning, rather than simple certainty.

he is positive

Conveys a confident and optimistic assurance about something.

he has no doubt

Indicates a complete absence of uncertainty or skepticism.

he is definite

Suggests a clear and unambiguous certainty, leaving no room for questioning.

he firmly believes

Highlights the strength and conviction behind the person's belief.

he is of the opinion

Presents the certainty as a considered judgment or assessment.

he is persuaded

Implies that the certainty is based on convincing evidence or arguments.

he ascertains

Focuses on the act of discovering or establishing something with certainty.

he knows for sure

Uses a more emphatic and informal way of expressing certainty.

FAQs

How can I use "he is certain" in a sentence?

Use "he is certain" to express a person's strong conviction or assurance about something. For example: "He is certain that the project will succeed."

What phrases are similar to "he is certain"?

Alternatives include "he is sure", "he is convinced", or "he has no doubt". The best choice depends on the specific nuance you want to convey.

Is it appropriate to use "he is certain" in formal writing?

Yes, "he is certain" is appropriate for formal writing, particularly when reporting facts or describing a character's state of mind. However, ensure that the certainty is justified within the context.

When should I avoid using "he is certain"?

Avoid using "he is certain" if there is insufficient evidence to support such a strong claim. In those cases, consider weaker alternatives such as "he believes" or "he suspects".