English Language Arts
Grade 9
15 min
Identify and correct errors with compound and joint possession
Identify and correct errors with compound and joint possession
What you'll learn
- Identify verbs in sentences.
- Recognize if a verb ends with '-ed'.
- Choose the sentence that uses the regular past tense verb.
- Explain why a verb is a regular past tense verb.
Tutorial Preview
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Introduction & Learning Objectives
Learning Objectives
Differentiate between joint possession and separate (individual) possession in a sentence.
Correctly apply the apostrophe rule for joint possession to compound subjects.
Correctly apply the apostrophe rule for separate possession to multiple subjects.
Identify and correct apostrophe errors in sentences involving compound nouns (e.g., 'mother-in-law').
Analyze sentences to determine the nature of ownership (shared or individual) and punctuate them accordingly.
Revise their own analytical and thesis-driven writing to ensure accurate use of possessive apostrophes.
Whose phone is it anyway? 📱 Is it 'Maria's and Sam's phone' or 'Maria and Sam's phone'? The answer depends on how many phones there are!
This tutorial...
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Key Concepts & Vocabulary
TermDefinitionExample
PossessionThe state of having, owning, or controlling something. In grammar, it is shown using an apostrophe and 's' ('s) or just an apostrophe (s').The student's essay received a high grade.
Compound PossessionA broad term for showing ownership by more than one noun. This can be either joint (shared) or separate (individual).This concept covers both 'the cat and dog's toys' (joint) and 'the cat's and the dog's toys' (separate).
Joint PossessionWhen two or more nouns own the *same* thing or things together. The apostrophe is placed only on the final noun in the group.Romeo and Juliet's love story is a tragedy. (They share one story).
Separate PossessionWhen two or more nouns each own their *own* separat...
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Key Rules & Conventions
The Rule of Joint Possession
Noun 1 + and + Noun 2's + Item(s)
Use this when two or more subjects co-own the same item(s). The possessive marker ('s) is added ONLY to the last noun in the series.
The Rule of Separate Possession
Noun 1's + and + Noun 2's + Item(s)
Use this when two or more subjects each own their own, distinct items. The possessive marker ('s) is added to EVERY noun in the series.
The Rule for Possessive Compound Nouns
(Full Compound Noun)'s + Item
To show possession for a hyphenated or multi-word noun, treat the entire phrase as a single unit and add the possessive marker ('s) to the very end of the last word.
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Challenging
A student is drafting a thesis statement: 'The novel's primary and secondary character's motivations reveal the author's pessimistic worldview.' Which revision best corrects the apostrophe error for clarity and accuracy?
A.The novel's primary and secondary characters' motivations...
B.The novel's primary's and secondary character's motivations...
C.The novel's primary and secondary characters motivations...
D.The novels primary and secondary character's motivations...
Challenging
Which of the following sentences correctly navigates all rules of compound and joint possession based on its logical meaning?
A.The commander-in-chief and the soldier's duties are vastly different.
B.The president and vice president's office is located in the West Wing.
C.My mother's and my father's shared bank account has been closed.
D.The student council's and the principal's meeting was productive.
Challenging
A sentence reads: 'The playwright and the main character's understanding of justice is the central theme.' What is the subtle logical error in this use of joint possession?
A.playwright and a fictional character cannot have a shared, single understanding; their understandings are inherently separate.
B.The word 'justice' cannot be possessed.
C.The apostrophe should be on 'playwright's' instead.
D.There is no logical error; they can share an understanding.
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What grade level is "Identify and correct errors with compound and joint possession"?
Identify and correct errors with compound and joint possession is a Grade 9 English Language Arts lesson on ExcelOS.
What will I learn in Identify and correct errors with compound and joint possession?
You'll be able to: Identify verbs in sentences; Recognize if a verb ends with '-ed'; Choose the sentence that uses the regular past tense verb.
Is "Identify and correct errors with compound and joint possession" free to practice?
Yes. You can read the tutorial preview for free, and signing up for a free ExcelOS account unlocks the full tutorial and all practice questions with instant feedback.
How many practice questions are included with Identify and correct errors with compound and joint possession?
This lesson includes 25 practice questions across multiple difficulty levels, each with instant feedback and explanations.