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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
CEO of Professional Science Editing for Scientists @ prosciediting.com
command of a subject
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "command of a subject" is correct and usable in written English.
It can be used to describe someone's proficiency or mastery in a particular area of knowledge or skill. Example: "Her command of the subject was evident during the presentation, as she answered all questions with confidence and clarity."
✓ Grammatically correct
News & Media
Science
Encyclopedias
Alternative expressions(2)
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
1 human-written examples
Morris's influential painted-plywood beams and L shapes of 1964-65 — inert as sculpture, with none of the sensational truculence of an Andre — are like fine class projects, demonstrating command of a subject.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
59 human-written examples
Not only is it important for the physician to obtain a fundamental command of a medical subject, it is equally important to become familiar with the diversity of the patients to which the physician communicates the medical information.
Science
He follows in the line of descent from Lester Bangs to Greil Marcus to Ben Thompson: startlingly thoughtful, gracefully illuminating, in command of an anarchic subject because the will, the knowledge and the technique conspire to place some kind of order on the unorderable.
News & Media
In the 17th-century hierarchy of the various genres, history painting held the highest position, because it required a complete command of all subjects, from landscape to architecture, from still life to drapery, from animals to, above all, the human figure, in a wide range of postures, expressions, and costumes.
Encyclopedias
They demonstrate a command of their subject matter and an understanding, respect and appreciation of other cultures which, in and of itself, distinguishes them at a time when so many citizens of western countries have withdrawn within themselves, gravitating to demigods offering simple answers that are built on false patriotism and misplaced anger.
News & Media
And the husband would be bound to decapitate himself (shouting 'I told you so' in his final seconds)." Beard's charming command of her subject has had a palpable effect in England, where the university study of classics is on the rise, even as French and German are falling off.
News & Media
Not surprisingly, the best tutors had a superb command of their subject matter (content knowledge), allowing them to draw on appropriate information for whatever problems might arise in the tutorial situation.
Science
Indeed, Wright et al. (1998) contended that oral exams reflect the scientific maturity of the student and that written exams measure a student's command of the subject matter.
Science
Though the faculty member presumably has a much stronger command of the subject matter than students, teacher-dominated discussions may impede student leadership development and limit opportunities for interactive learning.
Science
"There's no question that he's in complete command of his subject," one student wrote in a critique.
News & Media
Few things I like better in life than getting lost in a good book written by an author who is in full command of his subject matter, either because he has lived the story or so thoroughly researched it.
News & Media
Expert writing Tips
Best practice
Use "command of a subject" to convey a strong sense of expertise and authority. For example, a historian might demonstrate a "command of ancient civilizations".
Common error
Avoid using "command of a subject" to describe mere familiarity. It implies a higher level of mastery than simply knowing basic information.
Source & Trust
88%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "command of a subject" functions as a noun phrase, indicating expertise or mastery in a particular field. Ludwig AI confirms it is correct and usable in written English. It often acts as the object of a verb, describing what someone possesses or demonstrates.
Frequent in
News & Media
30%
Science
25%
Formal & Business
20%
Less common in
Encyclopedias
15%
Reference
5%
Wiki
5%
Ludwig's WRAP-UP
In summary, "command of a subject" is a well-established phrase used to denote a high level of expertise and comprehensive knowledge in a specific area. As Ludwig AI confirms, the phrase is grammatically correct and suitable for use in various contexts, ranging from news articles to academic papers. Alternatives include "mastery of a topic" or "expertise in a field", depending on the specific nuance you wish to convey. The phrase is versatile and effective for highlighting someone's competence and authority. It is most commonly found in news, science and formal business communications.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
mastery of a topic
Focuses on comprehensive knowledge and skill in a specific area.
expertise in a field
Highlights specialized knowledge and proficiency.
proficiency in a subject
Emphasizes competence and skill level.
grasp of a subject
Indicates a solid understanding and ability to handle the material.
knowledge of a topic
Refers to the factual understanding of the subject.
understanding of a field
Highlights comprehension and insight into the subject.
familiarity with a subject
Suggests acquaintance and working knowledge.
competence in the area
Focuses on the ability to perform tasks effectively.
skill in the subject
Emphasizes practical ability and dexterity.
control over a topic
Indicates the ability to manage and manipulate the subject matter.
FAQs
How can I use "command of a subject" in a sentence?
You can use "command of a subject" to describe someone's expertise or mastery in a particular area. For example: "Her command of a subject was evident during the presentation."
What are some alternatives to "command of a subject"?
Alternatives include "mastery of a topic", "expertise in a field", or "proficiency in a subject".
Is "command of a subject" formal or informal?
The phrase "command of a subject" is suitable for both formal and neutral contexts, commonly appearing in news articles, academic papers, and professional reports.
What does it mean to have a "command of a subject"?
Having a "command of a subject" signifies a deep understanding, comprehensive knowledge, and the ability to use that knowledge effectively and confidently.
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Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
88%
Authority and reliability
4.5/5
Expert rating
Real-world application tested