Difficulty: Hard

Average Score: 35%

Which sentence is grammatically correct?

Rationale

Mona performed badly during dance class.

This sentence correctly uses the adverb "badly" to modify the verb "performed," adhering to the rules of standard English grammar regarding adverbial usage.

A (Sam behaved bad during Mr. Johnson's lecture.) YOUR ANSWER

The word "bad" is an adjective, which should not modify the verb "behaved." The correct form should be "badly," as it is the adverb that describes how Sam behaved.

B (Joe limped bad after his collision in gym class.) YOUR ANSWER

Similar to choice A, the use of "bad" as an adjective incorrectly modifies the verb "limped." The correct term here would be "badly," which is the appropriate adverb to describe the manner of limping.

C (Mona performed badly during dance class.) CORRECT

This option is grammatically correct because "badly" is used as an adverb to accurately modify the verb "performed," indicating how the performance occurred.

D (The chemistry lab after third period smells badly.) YOUR ANSWER

In this case, "badly" is incorrectly used, as it should be an adjective that describes the noun "lab." The sentence would be correct if it stated, "The chemistry lab smells bad," since "bad" is used to describe the state of the lab rather than the action of smelling.

Conclusion

In English grammar, distinguishing between adjectives and adverbs is crucial for constructing correct sentences. The only grammatically accurate choice presented is option C, where "badly" correctly modifies the verb "performed." The other choices misuse the terms, leading to sentences that do not adhere to proper grammatical standards.

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