Final answer:
The error in the sentence is the incorrect use of possessive nouns. Correct sentences are provided by using the possessive form of the noun.
Step-by-step explanation:
The error in the sentence is the incorrect use of possessive nouns. To make the appropriate changes, the possessive form should be used. In the sentence, 'Mary dog was a beagle', the correct sentence should be 'Mary's dog was a beagle'. Similarly, the correct sentences for the other examples would be:
- The dog's teeth are sharp.
- Larry's hair is very long.
- I forgot my backpack at Janette's house.
- Do you know the doctor's phone number?
- The cat's collar is blue.
- Aaron's friend is named Adam.
- I really like my grandmother's cookies.
- The plant's stem appears wilted.
- My brother's books are in his bag.
Learn more about Possessive Nouns