Answer :
To correct the sentences that have mistakes, let's go through them one by one:
Incorrect: I'm shorter than you by three inches.
Correction: I'm three inches shorter than you.
Explanation: In English, it is more natural to say the size difference before the comparison.
Correct: Steve is older than I am.
Explanation: This sentence is already correct, as it follows proper comparative structure.
Correct: The little boy sang like a bird.
Explanation: This sentence uses a simile correctly with "like," so no correction is needed.
Correct: Paul is not as handsome as Tom.
Explanation: This sentence correctly uses the "not as...as" structure for comparisons, so no changes are necessary.
Correct: She is quite a pretty girl.
Explanation: This sentence is grammatically correct. "Quite a pretty girl" is a correct expression.
Correct: Sally is the tallest girl in our class.
Explanation: This sentence uses the superlative correctly as it compares Sally to all other members of the class.
Correct: Let me know if you need any further help.
Explanation: This sentence is correct. "Further help" is a common phrase in English.
Correct: Tracey studies hard.
Explanation: This sentence is concise and correct, with "hard" functioning as an adverb describing the verb "studies."
The primary aim here is to ensure the sentences are grammatically correct and sound natural in English.