Idnetify the correct sentence.

Please proceed slowly.
He knows English good.
She is real smart.
She listens good.

Which one used an adverb correctly? I'll be glad to check your answer.

The correct sentence is: "Please proceed slowly."

To identify the correct sentence among the options provided, we need to analyze the grammar and usage of the words in each sentence.

1. "Please proceed slowly."
This sentence is grammatically correct. The verb "proceed" is used correctly, and the adverb "slowly" is used to modify the action of proceeding.

2. "He knows English good."
This sentence is not correct. The adjective "good" should be replaced with the adverb "well" to describe the verb "knows."

3. "She is real smart."
This sentence is colloquially correct but not considered grammatically correct. The word "real" is an adverb used to intensify the adjective "smart." However, for standard grammar, "real" should be replaced with "really" to modify the adjective.

4. "She listens good."
This sentence is not grammatically correct. The word "good" is an adjective, and in this sentence, we need an adverb to modify the verb "listens." The correct sentence would be "She listens well."

Therefore, the correct sentence is "Please proceed slowly."