IXL | Identify and correct errors with compound and joint possession

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Greg's and Jill's summer vacation plans followed months of research, as they sought to choose a single destination that would satisfy both Greg's need for adventure and Jill's love of cities.

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question

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Boston and San Diego's weather could hardly be more different. San Diego is generally warm, with temperatures typically ranging between 60°F and 80°F. Boston, on the other hand, experiences more extreme weather, with hot and humid weather in the summer and freezing temperatures in the winter.

key idea

A possessive noun shows who or what owns something or has something.

To form the possessive of a compound noun, make the last part of the noun possessive.

my sister-in-law's career

the secretary of state's speech

the chiefs of staff's legacies

my great-grandmothers' names

When two nouns joined by and share possession of something, only the second noun should be written as a possessive noun.

Becca and Lily's room is larger than mine.

Becca and Lily share one room.

When two nouns joined by and do not share possession of something, both nouns should be written as possessive nouns.

Becca's and Lily's rooms are larger than mine.

Becca and Lily each have their own room.

solution

Boston's and San Diego's is correct. San Diego and Boston do not share the same weather, so both nouns should be written as possessive nouns.

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