English Language Arts
Grade 9
15 min
Form and use compound words
Form and use compound words
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Introduction & Learning Objectives
Learning Objectives
Identify the three types of compound words (open, closed, hyphenated) in complex literary and non-fiction texts.
Analyze how authors use compound words to create specific tones, imagery, or characterization.
Correctly form compound modifiers according to standard grammatical rules.
Differentiate between permanent compounds and temporary compounds used for specific descriptive purposes.
Use a dictionary and style guide to verify the correct form of unfamiliar or evolving compound words.
Integrate varied and precise compound words into analytical and narrative writing to enhance clarity and style.
Ever wonder why 'smartphone' is one word, 'ice cream' is two, and 'state-of-the-art' needs hyphens? 📱🍦 Let's decode the secre...
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Key Concepts & Vocabulary
TermDefinitionExample
Compound WordA word formed by combining two or more individual words to create a new word with a distinct meaning.The *firefly* lit up the *backyard*.
Closed CompoundTwo words joined together to form a single word without a space or hyphen. These are typically permanent and found in the dictionary.notebook, keyboard, sunflower, masterpiece
Open CompoundTwo separate words that are used together so frequently they are considered a single unit or concept, but are still spelled as two words.high school, living room, post office, coffee table
Hyphenated CompoundTwo or more words joined by a hyphen, often to function as a single concept or to avoid ambiguity.state-of-the-art, well-being, mother-in-law, editor-in-chief
Compound Modifier (Phrasal Adjective)A temporary, hyphe...
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Key Rules & Conventions
The Compound Modifier Rule
When a compound modifier—two or more words acting as a single adjective—comes *before* a noun, hyphenate the words.
This rule prevents misreading. For example, 'a man-eating shark' (a shark that eats men) is different from 'a man eating shark' (a man who is eating shark meat). The hyphen is usually dropped when the modifier comes *after* the noun (e.g., 'The decision was last minute' vs. 'It was a last-minute decision').
The Adverb Exception
Do not use a hyphen to connect an adverb ending in '-ly' to the adjective it modifies.
The '-ly' suffix already clearly marks the word as a modifier, so a hyphen is redundant. For example, write 'a highly anticipated film' not 'a highly-...
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Challenging
A student wrote the following sentence: 'The critically-acclaimed, but little-known author gave a three hour long lecture.' Which revision corrects all the compound word errors according to the tutorial's rules?
A.The critically acclaimed, but little known author gave a three-hour-long lecture.
B.The critically-acclaimed but little-known author gave a three-hour long lecture.
C.The critically acclaimed, but little-known author gave a three-hour long lecture.
D.The critically acclaimed, but little-known author gave a three-hour lecture.
Challenging
A student wants to revise this weak thesis: 'The book, which is about the future, has characters who are controlled by technology and it makes you think.' Based on the tutorial's worked example, which revision most effectively uses compound words to enhance clarity and style?
A.The futuristic novel uses technology-controlled characters to explore thought-provoking questions about humanity.
B.The book about the future has technology controlled characters and thought provoking questions.
C.The futuristic novel uses characters controlled-by-technology to explore questions that are thought-provoking.
D.The novel, set in a future-time, uses technology-controlled characters to explore thinking-thoughts.
Challenging
An author writes a passage about a desolate city using words like 'broken-down cars,' 'long-abandoned factories,' and 'sun-bleached signs.' How does this pattern of using hyphenated compounds contribute to the text's style and mood?
A.It creates a fast-paced, exciting rhythm that makes the city seem vibrant.
B.It demonstrates the author's large vocabulary without affecting the mood.
C.It creates a heavy, layered sense of decay and history, enhancing the desolate mood.
D.It makes the writing feel technical and journalistic, removing emotion from the scene.
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