sub
sub — verb
- subpresent simple I / you / we / they
- subs3rd person singular
- subbing-ing form
- subbedpast simple
1. to take part in a sports game as the person who fills in for another player who
to take part in a sports game as the person who fills in for another player who cannot keep playing
Linh subbed for the injured goalkeeper in the second half.
sub for [someone's position]
Cyrus subbed in after the team's star player twisted his ankle.
sub in — intransitive phrasal verb
Feng subbed for the captain in the second half and scored the winning goal.
Baraka subbed for the centre forward who felt dizzy during the match.
- replace
more formal, used in any context
- fill in for
informal, same register
- stand in for
suggests a temporary role
文法句型
sub for [someone/someone's position]
sub in
用法筆記
Informal short form of 'substitute'. Only used in a sports context. The player who enters the game is the subject.
常見錯誤
2. to do someone's job or duty for a short time while they are away or unable to do
to do someone's job or duty for a short time while they are away or unable to do it
Élise subbed for the biology teacher who had caught the flu.
sub for [someone] (work context)
Christopher subbed for his manager during the weekly sales meeting.
Devika asked a colleague to sub for her at the morning shift.
Sumin regularly subs for the receptionist when she goes for lunch.
- cover for
slightly more formal, same meaning
- stand in for
emphasises the temporary nature
- take over for
may imply a longer period
文法句型
sub for [someone]
sub for [someone] at [event]
用法筆記
Like sense 1, this is the intransitive use of 'sub' meaning the covering person is the subject. The workplace context is the key difference from sense 1.
常見錯誤
3. to take one player off the field and send a different player on, an action norma
to take one player off the field and send a different player on, an action normally taken by the coach
The manager subbed Jude in after the first half of the game.
sub [player] in — transitive with adverb particle
Felipe was subbed out in the last ten minutes of the match.
passive: be subbed out
Manager Tahir subbed the striker off at half-time and brought on a fresh forward.
Eri felt disappointed when she was subbed off just before the penalty kick.
- keep on
to let a player continue playing
文法句型
sub [player] [in/out/off]
be subbed [in/out/off]
用法筆記
This is the transitive version of sense 1 — the coach or manager is the subject, and the replaced player is the object. The passive form ('be subbed off/out') is very common when describing a player's experience.
常見錯誤
4. to use one item, ingredient, or material instead of another in a recipe, project
to use one item, ingredient, or material instead of another in a recipe, project, or task
Adina subbed olive oil for butter in the cake to make it lighter.
sub [new item] for [original item] — the replacement item comes first
Mert subbed tofu for chicken in the soup to make it vegetarian.
Sana subbed honey for sugar in her tea every morning.
Ari subbed a red pepper for the green one since the store had none.
- substitute
the full form, more formal
- swap
suggests exchanging, often in cooking
- replace with
the original item is the object of the verb
文法句型
sub [new item] for [original item]
用法筆記
The pattern 'sub A for B' means A is the new thing being used, and B is the original thing being replaced. This is a frequent point of confusion.
常見錯誤
5. to remove something and put a different thing in its place, especially as an imp
to remove something and put a different thing in its place, especially as an improvement or update
The design team decided to sub out the old company logo.
sub out [noun] — phrasal verb pattern
Dr. Chen subbed out the damaged parts of the machine and fitted new ones.
The bakery subbed out wooden shelves and put up metal racks instead.
The English department subbed out the old textbook for a newer edition.
- keep
to continue using the original item
文法句型
sub out [item]
sub [item] out
用法筆記
Unlike sense 4 (which introduces the replacement item with 'for'), this sense uses the phrasal verb 'sub out' and the original item being removed is the direct object. The replacement may be stated later with 'for' or left implied.
6. to read through a piece of writing and correct its errors or improve its style s
to read through a piece of writing and correct its errors or improve its style so it is ready for publishing
The publisher hired a freelancer to sub the chapters of the new novel.
sub [document] — sub-editing context
The copy editor stayed late to sub the articles for the morning paper.
The news desk needed someone to sub the interview before it went online.
Each chapter of the handbook was subbed by a different proofreader.
文法句型
sub [text/document/article]
用法筆記
Primarily used in British English publishing and journalism. The more common full form is 'sub-edit'. In American English, 'copy-edit' is preferred.
常見錯誤
7. to be employed as a sub-editor — checking and preparing written material at a ne
to be employed as a sub-editor — checking and preparing written material at a newspaper, magazine, or publishing house before it goes to print.
Élise subs for a local Bristol newspaper, checking around thirty news articles for grammar and accuracy each weekend.
sub + for + [publication]
After university, Diya moved to Glasgow to sub for a national Sunday newspaper, polishing political columns each Saturday night.
Reuben has been subbing at Oxford University Press for two years, mostly on academic history titles.
Xiu subs for an online news site three evenings a week, fixing breaking headlines before they go live.
文法句型
sub + for + publication/company
用法筆記
Typically used in British journalism contexts. The preposition for introduces the publication; at introduces the employer. This sense describes the job role itself, not the action of editing a specific text.
常見錯誤
8. to lend someone a small amount of money — usually as a temporary arrangement unt
to lend someone a small amount of money — usually as a temporary arrangement until they receive their wages or can pay the money back.
Faisal asked his colleague to sub him a tenner until payday.
sub + person + amount
Nia subbed Leo twenty pounds for the taxi fare home.
Gita promised to sub Omar lunch money when he forgot his wallet.
The manager agreed to sub Diego his wages a few days early.
Amira often subs her colleagues a fiver for the office lunch run when their wallets are empty.
- lend
more standard and widely understood; 'sub' is informal British English only
- advance
more formal; 'advance' often implies an employer giving wages early, whereas 'sub' can be between friends
- spot
British informal, similar register but less common; 'spot' often implies a smaller, more spontaneous loan
- borrow
opposite direction of money transfer; the person receiving the sub borrows; the person giving it subs
文法句型
sub + person + money
sub + person
用法筆記
British informal. Typically used with a direct object (the person) and optionally the amount. The money is usually a small sum for immediate, short-term needs.
常見錯誤
sub — noun
- subsingular
- subsplural
1. a player who joins a game after it has started, taking the place of another play
a player who joins a game after it has started, taking the place of another player on the same team
Coach Williams sent Joon in as a sub during the second half of the match.
sub + in + during [time period]
The injured forward was replaced by a young sub from the reserve team.
passive: was replaced by [a] sub
With only five minutes left, the team used their last available sub.
Coming off the bench as a sub can change the momentum of the game.
The basketball sub scored twelve points in the final quarter.
- replacement
more general; used for any person or thing that takes another's position
- stand-in
informal; common in both sports and non-sports contexts
- reserve
focuses on being available on the bench, not yet playing
- starter
a player who is on the field or court from the beginning
文法句型
sub + for + person
常見錯誤
2. a teacher who fills in temporarily when the regular teacher is absent from a cla
a teacher who fills in temporarily when the regular teacher is absent from a class
Wren worked as a sub at Lincoln Elementary School last Tuesday.
work as a sub + [at school]
The regular math teacher was sick, so a sub led the lesson instead.
Our school keeps a list of certified subs who can cover any grade level.
Finding a sub for a science class can be hard because of the lab work.
Ayesha left detailed lesson plans for the sub who would take over her class.
- supply teacher
British equivalent; slightly more formal
- cover teacher
used in British schools; focuses on covering the absent teacher's duties
- guest teacher
more polite or formal; sometimes used in professional development contexts
文法句型
work as a sub
用法筆記
Common in American English; British speakers more often say 'supply teacher' or 'cover teacher'.
常見錯誤
3. a person whose job is to read, correct, and improve written material, such as ne
a person whose job is to read, correct, and improve written material, such as newspaper articles, before it is printed or published online
The sub checked every article for spelling mistakes and factual errors.
sub + check + [article] + for [errors]
David worked as a sub for a London newspaper before becoming a reporter.
The night sub turned Idris's jumbled two-page report on the council meeting into a tight five-hundred-word story.
The sub shortened the headline to fit the narrow column space.
Last Friday a careful sub spotted a misspelt minister's name in the front-page headline minutes before printing.
- copy editor
American equivalent; also used in book publishing globally
- editor
broader term; a sub-editor is a specific type of editor with focus on text-level corrections
- proofreader
more limited role; proofreaders focus on typos and formatting, not on improving structure or clarity
用法筆記
Chiefly used in British and Commonwealth publishing contexts. In American English, the role is often called a 'copy editor'.
常見錯誤
4. a long, narrow warship that can travel both on the surface of the water and deep
a long, narrow warship that can travel both on the surface of the water and deep underwater
The nuclear sub can stay underwater for several months at a time.
collocation: nuclear sub / stay underwater
A navy sub surfaced near the coast during the training exercise.
The captain ordered the sub to dive to two hundred metres below the surface.
Tanvi read a book about life aboard a military sub during the Cold War.
Sonar equipment on the sub detected another vessel in the distance.
用法筆記
'Sub' is the common short form in both casual conversation and news reporting. 'Submarine' is more formal or technical.
5. a regular payment that gives you access to a service, a set of digital content,
a regular payment that gives you access to a service, a set of digital content, or regular deliveries of a product over a fixed period
Obi cancelled his streaming sub after the monthly price went up.
collocation: cancel / streaming sub
A yearly sub to the magazine costs less than paying month by month.
Élise signed up for a sub that delivers fresh coffee beans every two weeks.
The app offers a free trial before asking users to buy a sub.
My gym sub includes access to all classes and the swimming pool.
- subscription
the full form; used in all contexts, especially formal
- membership
often used when the service includes community benefits or physical access
- plan
emphasises the pricing tier or package, not the payment method
用法筆記
Very common in casual conversation about streaming services, magazines, apps, and online platforms. The full form 'subscription' is preferred in formal or legal writing.
常見錯誤
6. a long, soft bread roll cut open and filled with meat, cheese, salad, and sauce,
a long, soft bread roll cut open and filled with meat, cheese, salad, and sauce, eaten as a large sandwich
Evelyn ordered a turkey sub with lettuce, tomato, and mustard for lunch.
collocation: [meat] sub with [fillings]
The corner deli makes the best meatball subs in the neighbourhood.
Lucía split a foot-long sub with her friend since it was too big.
A toasted sub filled with roast beef and melted cheese is hard to beat.
Sivan grabbed a veggie sub from the shop across the street during lunch break.
- submarine sandwich
the full form; used in menus and more formal descriptions
- hoagie
regional term, common in Pennsylvania and surrounding areas
- grinder
regional term, common in New England; often implies a toasted sub
- hero
regional term, common in New York City area
用法筆記
Also called a 'submarine sandwich', 'hoagie', 'grinder', or 'hero' depending on the region of the US. 'Sub' is common in the Northeast and Midwest.
常見錯誤
sub — abbreviation
1. the word 'sub' used as an informal clipped form of 'substitute' — a shortened wa
the word 'sub' used as an informal clipped form of 'substitute' — a shortened way of referring to anyone who temporarily takes over another person's role in a workplace, event, or everyday situation, without specifying sports or teaching.
The office manager called a temp agency to send a sub for the receptionist.
general workplace: sub fills a temporary role
Yumi found a sub to lead the workshop after she was called to a meeting.
event context: sub takes over a scheduled duty
When the museum tour guide Sami fell ill on Saturday morning, the gallery manager rang round for a sub.
Kabir's sub for the hotel evening shift arrived twenty minutes late, so guests queued unattended at the front desk.
The pub hired a sub to cover the weekend shifts while the barman was away.
- substitute
the full form, appropriate in all registers
- replacement
more formal; does not imply a specific context
- stand-in
common in performing arts and temporary roles
- temp
specifically refers to a temporary office worker
- regular
the permanent person who normally holds the role
- permanent staff
the full-time employee, as opposed to a fill-in
文法句型
as a sub
sub + for + noun phrase
用法筆記
This clipped form is used across many contexts — workplaces, events, volunteering, and temporary duty cover — but is especially common in informal speech. The full word 'substitute' is preferred in formal writing. For the sports-specific or teaching-specific uses, see noun/1 and noun/2.
常見錯誤
2. the word 'sub' used as an informal clipped form of 'submarine' — the shortened w
the word 'sub' used as an informal clipped form of 'submarine' — the shortened way people refer to a vessel that can travel underwater in everyday conversation and news reporting, rather than using the full-length word 'submarine'.
The headline read "Navy sub maps Mariana Trench seabed" — a casual clip of "submarine" that fits the tabloid style.
newspaper headline: 'sub' as clipped noun
Wei's grandfather casually called his Cold War posting "the sub" rather than using the longer word "submarine".
informal speech: 'the sub' replaces 'the submarine'
Even the science magazine used "sub" in its headline, reserving "submarine" for the technical diagrams inside.
Schoolchildren on the field trip kept saying "sub" rather than "submarine" as they climbed into the museum exhibit.
Zara watched the sub disappear beneath the waves from the deck of the boat.
用法筆記
In everyday conversation, 'sub' is the common clipped form of 'submarine'. The full word is preferred in formal technical writing. Unlike noun/4 (which treats 'sub' as a standalone noun for the vessel), this abbreviation sense focuses on the word's status as a shortened form, though in practice the two overlap heavily.
3. the word 'sub' used as an informal clipped form of 'subscription' — the shortene
the word 'sub' used as an informal clipped form of 'subscription' — the shortened way people talk about recurring payments for services, publications, or digital platforms in casual conversation and online writing.
Nia pays for a monthly sub to watch movies on the streaming service.
monthly sub + streaming service collocation
Mira's gym sub jumped ten dollars this year, so she switched to a cheaper monthly plan.
You can get a free sub to the magazine for the first three months.
Kenji cancelled his gaming sub because he was too busy with work.
The music app offers a student sub at half the regular price.
- subscription
the full form, used in all registers but especially formal
- membership
similar concept but often implies belonging to an organisation, not receiving a service
文法句型
monthly / annual + sub
sub + to + service
用法筆記
Extremely common as a clipped form in digital contexts — streaming services, software-as-a-service, and online publications. The full form 'subscription' is used in formal or legal writing. This abbreviation sense documents the clipping itself; for the full semantic description of what a subscription is, see noun/5.
常見錯誤
4. the word 'sub' used as an informal clipped form of 'subeditor' — the shortened t
the word 'sub' used as an informal clipped form of 'subeditor' — the shortened term used within British publishing and journalism for the person who checks and improves written material before publication, especially in newspaper and magazine offices.
Omar works as a sub for a major daily newspaper in London.
newspaper job context: subeditor role
The sub caught several spelling errors before the article went to print.
Amara trained as a sub after finishing her journalism degree.
The sub rearranged the paragraphs and fixed the grammar without changing the reporter's original tone.
After two senior staff retired, the Manchester Evening Post hired two fresh subs to handle the late edition.
- subeditor
the full form, used in British publishing
- copy editor
the American equivalent term
- proofreader
a narrower role focused on typos and formatting, not content improvement
用法筆記
Chiefly British usage — the clipped form is common within the publishing industry but may not be understood outside of it. In American English, 'copy editor' is the standard term. The full form 'subeditor' is preferred in formal writing. For a full description of the job role, see noun/3.
sub — prefix
1. used with numbers, prices, temperatures, or other measurements to show that a va
used with numbers, prices, temperatures, or other measurements to show that a value falls below a particular point or level.
The overnight temperature dropped to sub-zero levels, and the roads became very icy.
sub- + zero: common with temperatures
Elena's marathon time was sub-three hours, which earned her a spot in the next race.
The company's sales this quarter were sub-target by roughly twelve percent.
Sub-20°C weather is very unusual for a coastal area like this one.
- under
more common in everyday speech; 'sub-' is more technical
用法筆記
Usually attached to a number, a unit of measurement, or a word like 'zero' or 'target'. The hyphen is typically kept when the root is a number (sub-20) but often dropped with common nouns (subzero).
2. attached to nouns to describe something that is physically under or beneath some
attached to nouns to describe something that is physically under or beneath something else — for example, a passage under the ground, a ship that travels under the sea, or a layer of soil below the top layer.
The subway runs beneath the city streets and connects the airport to the downtown area.
subway: underground railway
Baraka served on a submarine for three years before transferring to a surface ship.
submarine: underwater vessel
The subsoil in this part of the valley contains a lot of clay and gravel.
Construction workers discovered a subfloor made of oak planks inside the old manor house.
用法筆記
This is the oldest and most widespread use of the prefix 'sub-', dating back to Latin. Many common English words (subway, submarine, subsoil) use this sense. The word formed is usually a noun.
3. used with adjectives and nouns to indicate that something is close to a particul
used with adjectives and nouns to indicate that something is close to a particular type or quality but does not fully reach it — for example, a climate that is almost tropical, or a level of awareness just below full consciousness.
The subtropical climate of southern Florida keeps the winters warm and the summers very humid.
subtropical: almost tropical
Iker's blood test revealed a subclinical infection — present in his body for weeks but causing no clear symptoms yet.
subclinical: present but below noticeable level
Bilal jumped back from the snake on the trail before his conscious mind reacted, driven by a subconscious fear.
The region has a subarctic climate, with long, cold winters and short, cool summers.
用法筆記
This sense appears mainly in scientific and descriptive vocabulary (subtropical, subarctic, subclinical, subconscious). These words are often treated as fixed terms rather than freely formed combinations.
4. attached to nouns to show that something is a division, section, or group that b
attached to nouns to show that something is a division, section, or group that belongs inside a larger category or structure — for example, a category within a larger category, or a committee that reports to a main committee.
The finance subcommittee will review the budget proposal before it reaches the full board.
subcommittee: a smaller committee within a larger one
Each main genre of literature can be divided into several subcategories.
Only a small subset of the survey responses showed strong dissatisfaction.
The course covers European history in three parts, and each part has several subsections.
- subdivision
a full word rather than a prefix, but carries the same idea
用法筆記
Words formed with this sense (subcategory, subcommittee, subset, subsection) are common in academic, business, and organizational writing. The root word is almost always a noun that names a category or group.
5. attached to adjectives to describe something that fails to meet the normal or ex
attached to adjectives to describe something that fails to meet the normal or expected standard of quality — for example, products that are below acceptable quality, or performance that is worse than average.
The contractor used substandard cement that began to crack within six months.
substandard: below acceptable quality
Hana's latest album was described by critics as subpar and lacking originality.
Inspectors found substandard housing in the old dock district, with broken radiators and bathrooms missing hot water.
The restaurant received negative reviews because of the subpar service and cold food.
- inferior
a full adjective, slightly more formal; 'sub-' is a prefix
- below standard
a phrase rather than a single word, with the same meaning
- superior
opposite in quality
用法筆記
This sense has a distinctly negative judgement. 'Substandard' is the most common word; 'subpar' is more informal and often used in sports or performance reviews. Do not confuse with sense 6 (LOWER RANK), which deals with hierarchy rather than quality.
常見錯誤
6. attached to nouns to show that a person or position is below another in rank, au
attached to nouns to show that a person or position is below another in rank, authority, or importance within an organization or hierarchy — for example, an employee who reports to a manager, or a junior officer in the military.
The manager asked his subordinate to prepare a summary of the quarterly figures.
subordinate: lower in rank within an organization
A sub-lieutenant in the navy holds a rank just below a full lieutenant.
The sub-warden is responsible for dormitory discipline when the warden is away.
Valentina was promoted to sub-editor after working as a junior reporter for two years.
用法筆記
Distinguish from sense 5 (INFERIOR QUALITY): this sense is about POSITION or RANK within a structure, not about quality. 'Subordinate' can be both a noun and an adjective. In military and organizational titles, the hyphen is typically kept (sub-lieutenant, sub-warden).