Adverbs are frequently used to give more information about verbs. In other words, adverbs often tell us how things happen.
Examples:
Adverbs of comment add information about the speaker’s opinion. They do not usually give information about how something happened. These adverbs modify the complete sentence.
Compare these sentences:
Sentence 1 gives more information about how she was singing.
Sentence 2 gives the speaker’s opinion.
You can place these adverbs in two different ways: