English Language Arts
Grade 12
15 min
Identify and correct errors with compound and joint possession
Identify and correct errors with compound and joint possession
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Introduction & Learning Objectives
Learning Objectives
Differentiate between joint possession (shared ownership) and separate possession (individual ownership) in complex sentences.
Correctly apply apostrophes to compound nouns (e.g., editor-in-chief) to indicate possession.
Analyze sentences from literary and academic texts to identify errors in compound and joint possession.
Correct sentences that contain errors in the use of possessive apostrophes with multiple owners.
Construct sophisticated sentences that accurately demonstrate both joint and separate possession.
Explain the subtle shifts in meaning created by correct and incorrect apostrophe placement in possessive constructions.
Is it 'Gilbert and Gubar's theory' or 'Gilbert's and Gubar's theory'? In academic writing,...
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Key Concepts & Vocabulary
TermDefinitionExample
PossessionThe grammatical concept indicating ownership, origin, or a close relationship between two nouns.In 'the student's essay,' the essay 'belongs' to the student.
Compound NounA single noun formed from two or more words, which can be open (high school), hyphenated (sister-in-law), or closed (football).My editor-in-chief's feedback was insightful.
Joint PossessionA state where two or more nouns collectively own or are associated with the *same* single item or set of items.My mother and father's house is on the coast. (They share one house).
Separate PossessionA state where two or more nouns each individually own or are associated with their *own* distinct items.My mother's and father's cars are different models. (Each...
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Key Rules & Conventions
The Rule of Joint Possession
To show that two or more nouns share ownership of the same thing(s), add the possessive ending ('s or s') to the *final noun in the series only*.
Use this when multiple people co-own or co-create something. This rule signals a unified entity or a collaborative effort.
The Rule of Separate Possession
To show that two or more nouns each own their own separate things, add the possessive ending ('s or s') to *every noun in the series*.
Use this to emphasize individual ownership or to discuss distinct items belonging to different people. The number of items possessed is often plural.
The Rule for Compound Noun Possession
To make a compound noun possessive, add the possessive ending ('s or s') to the *very last word*...
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Challenging
A legal document aims to clearly state that a corporation has one set of responsibilities, and its board of directors has another, distinct set of responsibilities. Which of the following sentences achieves this with the greatest grammatical precision and clarity, avoiding any ambiguity about the antecedent of 'its'?
A.The corporation and its board of directors' responsibilities are outlined in the charter.
B.The corporation's responsibilities and its board of directors' are outlined in the charter.
C.The corporation's and its board of directors' responsibilities are outlined in the charter.
D.The corporation's responsibilities and those of its board of directors are outlined in the charter.
Challenging
Evaluate the following sentence: 'The Russian and French Revolutions' impacts on political philosophy are profound.' What is the most significant problem with this possessive structure?
A.It incorrectly uses joint possession, implying the two revolutions were a single event or had one single, combined impact.
B.The noun 'Revolutions' should not be plural before the apostrophe.
C.It correctly uses joint possession because both were revolutions.
D.The apostrophe should come before the 's' (Revolution's) to indicate singular possession.
Challenging
A student writes, 'The commander-in-chief's power is checked by the House of Representatives and the Senate's authority.' From a grammatical standpoint, what is the most precise critique of this sentence?
A.The sentence is perfect; it correctly shows three separate entities with their own powers.
B.The phrase 'the House of Representatives and the Senate's authority' incorrectly uses joint possession for two separate legislative bodies that have distinct authorities.
C.The possessive for 'commander-in-chief' is incorrect; it should be 'commander's-in-chief'.
D.The sentence should use 'their' instead of an apostrophe for the legislative bodies.
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