
Knowing when to use an apostrophe can be tricky. In English, apostrophes are used to indicate possession or ownership, form contractions, and, in some cases, pluralisation. For example, in the phrase the school's headmaster, the school possesses or owns the headmaster. Apostrophes are also used in contractions, where they represent missing letters, such as I've for I have. In some cases, apostrophes can be used to form the plural of abbreviations, such as Ph.D.'s for multiple Ph.D.s. When it comes to the word muscles, the general rule is that no apostrophe is needed to form the plural. However, in informal contexts, you may encounter the use of an apostrophe to denote plural possession, as in the muscle's function or the muscle's name is long and tedious to write out.
| Characteristics | Values |
|---|---|
| Use | Possession or ownership |
| Use | Contraction |
| Use | Plural form of abbreviations with periods between letters |
| Use | Omitting letters or numbers |
| Use | Forming part of an organisation's name |
| Use | Representing inflections of words and word-like elements in Polish |
| Use | Marking the genitive for words ending in -s, -x, and -z |
| Use | Representing the glottal stop in Arabic |
| Use | Representing standard spoken practice |
| Recommendation | Consult a style guide for the appropriate punctuation |
| Recommendation | Do not use to make nouns and shortened forms plural |
| Recommendation | Do not use for Australian place names involving possessives |
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What You'll Learn

Apostrophes indicate possession or ownership
Apostrophes are used to indicate possession or ownership. They can be tricky to use, and it's not always easy to determine when you need one and when you don't. This is especially true when it comes to forming the plural of certain words. For example, in personal training, muscles are often referred to in a shortened manner, such as "tris" for "triceps." In this case, the use of an apostrophe is not necessary, as it is simply a shortened form of the word. However, some people may choose to use an apostrophe when referring to muscles in a shortened manner, as in "tri's" for "triceps," to indicate a plural form. This usage of an apostrophe is not standard but can be seen as acceptable in certain contexts, especially when it helps to eliminate confusion.
In general, when it comes to possession or ownership, apostrophes are added to nouns to show that something belongs to someone or something. For example, "the school's headmaster" indicates that the school has a headmaster, and "the men's department" shows that the department belongs to or is intended for men. Here, the apostrophe is used to signal possession or ownership. This is true for most singular nouns and plural nouns that do not end in "s."
For plural nouns or words that do end in "s," you only need to add an apostrophe to signal possession. For example, "the babies' cribs" indicates that the cribs belong to multiple babies, and "the kids' room" shows that the room belongs to or is used by multiple children. In these cases, the apostrophe is added directly after the noun to show possession.
It's important to note that the use of apostrophes can vary depending on the style guide being followed. For example, the AP Stylebook, used by many American newspapers and businesses, states that only an apostrophe is needed after a proper noun that ends in "s" to indicate possession. Additionally, personal pronouns do not use apostrophes to form possessives, such as "my," "mine," "his," "her," and "our." However, pronouns like "your," "yours," "hers," "its," "ours," "their," and "theirs" can be more confusing and may require consulting a style guide or dictionary for proper usage.
Apostrophes can also be used to show the omission of letters or numbers, often in contractions or slang. For example, "I've" is a contraction of "I have," and "I'd" is short for "I would." Apostrophes can also be used in dates, such as "'99" for the year 1999. In these cases, the apostrophe is representing missing letters or numbers.
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They can also be used to show omission of letters or numbers
The apostrophe is a punctuation mark used in languages that employ the Latin alphabet, as well as some others. It has a variety of functions, one of which is to indicate the omission of letters or numbers. This usage is called a contraction, where an apostrophe represents missing letters or numbers. For example, "I would" is contracted to "I'd", and "do not" becomes "don't". In this way, the apostrophe can be used to denote plurality, especially with lowercase letters, such as in the case of "p's and q's".
The apostrophe can also be used to indicate the omission of letters or numbers in dates and years. For instance, the '60s refers to the 1960s, and '87 stands for 1987. This usage is particularly prevalent in certain languages, like Slovak, where an apostrophe indicates an abbreviated form of a word, such as "tys'" for "ty si" ('you are'). In Swiss number notation, the apostrophe serves as a thousands separator, so 2'000'000 represents two million.
In some languages, the apostrophe is used to substitute for other marks or to indicate the omission of certain sounds. In Italian, an apostrophe may replace a grave or acute accent, as in "E' vero che..." for "È vero che..." ('It is true that...'). In Jèrriais, the apostrophe signifies consonant length, so "t't" represents /tː/. In Swahili, an apostrophe after "ng" indicates that there is no /ɡ/ sound after the /ŋ/ sound, as in the word "singer".
The use of the apostrophe to indicate omission can also be seen in certain names and places. For instance, "Lake O' the Woods" and "O'Malley Draw" include apostrophes indicating the omission of letters. In Polish, an apostrophe is used to mark inflections of words and word-like elements, particularly with foreign words and names, as in "Kampania Ala Gore'a" for "Al Gore's campaign".
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Apostrophes are used to denote contractions
Contractions are often used to reflect standard spoken language, such as in the case of 'sake': "for convenience' sake" or "for goodness' sake". Some writers prefer to add an 's' to form the possessive, as in "for convenience's sake". Others may omit the apostrophe when there is an 's' sound before 'sake', as in "for morality's sake, but for convenience sake".
The use of an apostrophe to denote a contraction can also be seen in decade names, such as the '60s (1960s). It is important to note that contractions are generally considered more casual and may not be suitable for formal writing.
In addition to contractions, apostrophes are also commonly used to indicate possession or ownership. For example, "my brother's shoes" indicates that the brother owns the shoes. However, it is important to note that the presence of an 's' does not always indicate possession, as in the phrase "the school's headmaster", where the school does not own or possess the headmaster.
Apostrophes can be tricky to use correctly, and it is always a good idea to consult a style guide or dictionary when in doubt.
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They are not used to make nouns or shortened forms plural
Apostrophes are used to indicate possession or ownership. For example, "the men's department" indicates that the department belongs to the men. They are also used to form contractions, which are shortened forms of words or groups of words that omit certain letters or sounds. In contractions, an apostrophe represents the missing letters. For instance, "I have" is contracted to "I've".
However, apostrophes are generally not used to make nouns or shortened forms plural. The only exception to this rule is when dealing with abbreviations that include periods between letters, such as "M.D." or "Ph.D." In this case, the apostrophe is added to make the abbreviation easier to read in its plural form: "M.D.'s" or "Ph.D.'s".
When a word is shortened by cutting off the end, it typically does not use an apostrophe. For example, "sneak/stat/ab" became words without adding an apostrophe. This is also true for most common contractions, which are formed by attaching verbs, auxiliaries, or modals to other words, such as "I'd" or "they're."
In some cases, an apostrophe may be used to denote plural in shortened words or names. For example, in personal training, muscles are often referred to in a shortened manner, such as "tris" for "triceps." Using an apostrophe in this case, as in "tri's," can be considered valid and may even help eliminate confusion.
Additionally, when abbreviating a year, an apostrophe is used to replace the first two numbers, indicating the plural form. For example, "I graduated in '99." This use of the apostrophe is to convey common speech or slang, where a grammatically incorrect version of a word may be used to reflect how people speak.
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Apostrophes can be used to denote plural in abbreviations
The use of apostrophes to denote plural in abbreviations is a highly debated topic. While some grammar pedants claim that apostrophes cannot be used in any plurals, this is considered an outdated, dogmatic view. The modern consensus is that apostrophes should not be used to form the plurals of ordinary nouns, names, abbreviations, or numerical dates. For example, the plural of "MP" is "MPs", not "MP's".
However, there are exceptions to this rule. Apostrophes can be used to denote plural in certain cases, such as when dealing with awkward abbreviations that end with the letter "s". For instance, "SUS" (Soldier Under Sentence) can be written as "SUS's" to indicate the plural form. Another example is the use of apostrophes in pluralising lowercase letters, such as "p's and q's", which is clearer than "ps and qs". Additionally, in certain languages like Norwegian, the apostrophe is used to mark the genitive for words ending in an "-s" sound, such as "mann" ('man') and "mann's" ('man's').
In the case of contractions, apostrophes are used to indicate missing letters. For example, "I have" becomes "I've" and "they are" becomes "they're". This use of the apostrophe is common in casual writing and speech but may be avoided in more formal contexts.
The use of apostrophes to denote plural in abbreviations can be tricky, and it is essential to consider the potential for ambiguity. For example, "MP's" can be interpreted as either the plural form of "MP" or as a possessive noun, indicating something belonging to an "MP". Therefore, it is generally recommended to avoid using apostrophes for plurals of abbreviations unless there is a strong reason to do so, such as enhancing readability or adhering to a specific style guide.
In the context of muscles and whether they need an apostrophe, it is worth noting that in personal training, muscles are often referred to in a shortened manner. For example, the triceps may be called "tri's". While this usage of an apostrophe is not standard, it is done to denote plural and for convenience in written communication when the full form is tedious to write out.
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Frequently asked questions
No, the word "muscles" does not need an apostrophe when referring to more than one muscle. Apostrophes are generally not used to form the plural of a word. The only exception is when you have abbreviations that include periods between letters, such as M.D. or Ph.D. For example, the plural form of Ph.D. is Ph.D.’s.
Apostrophes are used to indicate possession or ownership. For example, "the men's department" or "the school's headmaster". Apostrophes are also used to show the omission of letters or numbers, such as in contractions. For example, "I have" becomes "I've" with the use of an apostrophe.
It depends. In some cases, an apostrophe can be used to denote a shortened form of a word. For example, "triceps" can be referred to as "tri's" in written form. However, this is not always the case, and it is generally recommended to spell out the full word if possible.











































