she must know

USAGE SUMMARY

The phrase "she must know" is correct and usable in written English.
It can be used when expressing a strong belief or assumption that someone has knowledge about a particular subject or situation. Example: "Given her experience in the field, she must know how to handle this issue effectively."

✓ Grammatically correct

News & Media

Academia

Science

Human-verified examples from authoritative sources

Exact Expressions

49 human-written examples

Why, now, work seven days a week for a candidate she must know will not win?

The New York Times

In any case, it is hard to agree that her deceptions were merely occasional or, as she put it to the House members, "white lies"; the self-deception required to serve Donald Trump with such unquestioning devotion, to be his voice, knowing what she must know, has proved anything but harmless.

The New Yorker

She must know.

The New Yorker

And she must know her place.

The New York Times

So she must know what she's taking on.

The Guardian

Once a student wants to become an entrepreneur, he or she must know what to do.

Massachusetts Institute of Technology

Human-verified similar examples from authoritative sources

Similar Expressions

5 human-written examples

This is a neat trick for your magic users, equip a Celestriad and a Soul of Thamasa and he/she must know Quick, and have AT LEAST 50 magic or above.

WikiHow

"She must know it's not just a personal choice.

The Guardian - Tech

She must know the argument, though: that voting Green risks letting in the Tories.

The Guardian

So you know which node you're at, you know what your choices are and what that means implicitly is she must know how she got there.

Yale University

She must float towards a physical ideal that is ever more childlike, homogeneous and powerless; and she must know her fate (cupcakes, not Kalashnikovs) when she is small.

The Guardian - Opinion

Expert writing Tips

Best practice

When using "she must know", ensure the context provides a reasonable basis for the assumption of knowledge. Avoid using it in situations where it is unlikely or impossible for the person to possess the information.

Common error

Avoid using "she must know" when you're merely speculating or guessing. If you lack solid evidence, opt for phrases like "she probably knows" or "she might know" to reflect a degree of uncertainty.

Linguistic Context

The phrase "she must know" functions as an epistemic modal, indicating a strong degree of certainty or logical necessity regarding the subject's knowledge. It expresses a confident assumption based on available information or context. As Ludwig AI indicates, the phrase is correct and usable in written English.

Expression frequency: Common

Frequent in

News & Media

79%

Academia

11%

Science

7%

Less common in

Formal & Business

2%

Encyclopedias

0%

Wiki

0%

Ludwig's WRAP-UP

In summary, "she must know" is a grammatically sound and frequently employed phrase used to express a strong belief that someone possesses certain knowledge. As Ludwig AI confirms, it's a correct and valuable addition to your writing toolkit. It's frequently found in "News & Media", "Academia", and "Science" contexts, highlighting its versatility. When wielding this phrase, ensure the context supports the assertion of knowledge and avoid overstating your certainty. Alternatives like "she probably knows" or "she likely knows" offer flexibility when a degree of uncertainty is needed.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

she surely knows

Replaces "must" with "surely", indicating a high degree of confidence in her knowledge.

she definitely knows

Substitutes "must" with "definitely", emphasizing the certainty of her knowledge.

she undoubtedly knows

Employs "undoubtedly" instead of "must", highlighting the lack of doubt about her knowledge.

she is certainly aware

Uses "is certainly aware" to replace "must know", focusing on her awareness rather than assumed knowledge.

she is likely aware

Replaces "must know" with "is likely aware", suggesting a probability of her knowledge.

she probably knows

Substitutes "must" with "probably", indicating a high likelihood of her knowledge.

she has to know

Replaces "must" with "has to", implying a necessity or obligation for her to know.

she is expected to know

Changes the phrase to indicate an expectation that she possesses the knowledge.

she is presumed to know

Replaces "must know" with "is presumed to know", suggesting a legal or formal assumption of her knowledge.

it is reasonable to assume she knows

Expresses the idea as a reasonable assumption, rather than a direct assertion of knowledge.

FAQs

How can I use "she must know" in a sentence?

You can use "she must know" to express a strong belief that someone has specific knowledge, like in "Given her experience, "she must know" the solution".

What is a more formal alternative to "she must know"?

In more formal contexts, you can use alternatives such as "she is expected to know" or "she is presumed to know".

Is there a difference between "she must know" and "she should know"?

"She must know" implies a stronger conviction that she possesses the knowledge, while "she should know" suggests an expectation or obligation to have the knowledge.

What can I say instead of "she must know" to show less certainty?

To show less certainty, you can use phrases like "she probably knows", "she might know", or "she is likely aware".