Used and loved by millions

Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak quote

Justyna Jupowicz-Kozak

CEO of Professional Science Editing for Scientists @ prosciediting.com

MitStanfordHarvardAustralian Nationa UniversityNanyangOxford

not knowing if

Grammar usage guide and real-world examples

USAGE SUMMARY

The phrase "not knowing if" is correct and usable in written English.
It can be used when expressing uncertainty about a situation or condition. Example: "I was left in a state of confusion, not knowing if I should proceed with the plan or wait for further instructions."

✓ Grammatically correct

News & Media

Human-verified examples from authoritative sources

Exact Expressions

58 human-written examples

Not knowing if I was listening to them".

News & Media

The Guardian

"Especially not knowing if I will continue fencing.

News & Media

The New Yorker

Not knowing if we could stay would have almost been worse.

News & Media

Independent

I was hesitant, not knowing if I should take this shot or that shot.

The maid is frowning at him sulkily, not knowing if she should have let him in.

News & Media

The New Yorker

But they also talked of the fear of not knowing if the killing was random.

News & Media

The New York Times

Not knowing if she is alive, the girl lives with neighbors.

News & Media

The New Yorker

People would laugh, not knowing if he was joking or mule-headed.

News & Media

The New Yorker

I remember not knowing if I'd ever play again, and then going back and playing.

News & Media

The New York Times

Not knowing if your friends are friends with you or your money.

News & Media

The Guardian

"I go to sleep every night not knowing if I will be evicted in the morning".

News & Media

The Guardian
Show more...

Expert writing Tips

Best practice

Use "not knowing if" to introduce a sense of suspense or anticipation in your writing. This can draw the reader in and create a more engaging narrative.

Common error

Ensure that the clause following "not knowing if" can stand alone as a potential question or condition. Avoid incomplete clauses that leave the reader guessing.

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

Antonio Rotolo, PhD

Digital Humanist | Computational Linguist | CEO @Ludwig.guru

Source & Trust

87%

Authority and reliability

4.5/5

Expert rating

Real-world application tested

Linguistic Context

The phrase "not knowing if" functions as a conjunction phrase introducing a clause of uncertainty or doubt. It sets up a condition where knowledge about a particular situation is absent, influencing the subsequent action or state. Ludwig AI confirms its grammatical correctness and wide usage.

Expression frequency: Very common

Frequent in

News & Media

85%

Wiki

7%

Science

4%

Less common in

Formal & Business

1%

Reference

1%

Encyclopedias

1%

Ludwig's WRAP-UP

In summary, "not knowing if" is a versatile and commonly used phrase to express uncertainty or a lack of information. As Ludwig AI indicates, it's grammatically correct and widely accepted. While more formal alternatives like "uncertain whether" exist, "not knowing if" is suitable for most contexts, particularly in news, media, and general writing. When using this phrase, ensure clarity by including a complete clause and identifying the subject experiencing the uncertainty. By understanding its function and purpose, writers can effectively convey states of doubt or anticipation in their narratives.

FAQs

How can I rephrase "not knowing if" to sound more formal?

For a more formal tone, you can use phrases such as "uncertain whether", "without knowing whether", or "in ignorance of whether".

Is it always necessary to include 'whether' after "not knowing"?

While "if" is commonly used after "not knowing", using "whether" is grammatically more precise, especially in formal writing. "If" can sometimes be ambiguous and is often better suited for conditional clauses.

Can "not knowing if" be used at the beginning of a sentence?

Yes, "not knowing if" can begin a sentence, but it usually requires a comma and a main clause to follow. For example, "Not knowing if the train would be on time, I decided to leave early."

What's the difference between "not knowing if" and "not knowing whether"?

While both phrases convey uncertainty, "not knowing whether" is often considered more grammatically correct and formal. In everyday conversation, "not knowing if" is widely accepted and understood.

ChatGPT power + Grammarly precisionChatGPT power + Grammarly precision
ChatGPT + Grammarly

Editing plus AI, all in one place.

Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.

Source & Trust

87%

Authority and reliability

4.5/5

Expert rating

Real-world application tested

Most frequent sentences: