Grammar, Plain and Simple

An adverb modifies a verb by telling more about the action.
Be sure to put the adverb as close to the verb as possible.

Sam walked to his room dejectedly.

In this sentence, the adverb dejectedly is separated from the verb walked.
We want to keep the adverb close to the verb that it is modifying.

Here is a better way to write the sentence:
Sam walked dejectedly to his room.
Now the adverb is right next to the verb, which makes the sentence stronger.

Look at these sentences. They show more examples of adverbs separated from the verbs they modify.
I’m finishing the book for school slowly.
The train chugged into town noisily.
Mary opened the wrapped gift eagerly.

The sentences will sound better and make more sense if you put the adverb right beside the verb.
I’m slowly finishing the book for school.
The train chugged noisily into town.
Mary eagerly opened the wrapped gift.

Remember to place an adverb close to the verb that it modifies.