Does this sentence sound right? I need to use two adverbs in a sentence.

John quickly ran across the bridge.

The sentence is all right, but has only one adverb, "quickly". "Across" is a preposition.

You said you needed two adverbs.

It's a good sentence, but you've only used one adverb, "quickly."

Yes, the sentence "John quickly ran across the bridge" sounds grammatically correct.

To determine if the sentence includes adverbs, we need to identify the words that modify the verb "ran." Adverbs modify verbs, adjectives, or other adverbs, providing more information on how, when, where, or to what extent an action is performed.

In the given sentence, "quickly" is an adverb that modifies the verb "ran," indicating the manner or speed of John’s running. Therefore, you have successfully used one adverb in your sentence.

If you'd like to include a second adverb, you can consider adding another word that modifies the verb "ran." For example, you could modify the sentence to say: "John quickly and gracefully ran across the bridge." In this revised sentence, "gracefully" is the second adverb, providing additional information on how John ran.