English verbs and adverbs that go together

Some verbs and adverbs go together naturally in English and it's often helpful to learn them as expressions.
act quickly: "We have to act quickly if we want to agree to their deal."
listen attentively: "She listened attentively to what her boss was saying."
play fair: "I don't feel that you are playing fair – you seem to change your mind when it suits you!"
search thoroughly: "The police searched the house thoroughly, but couldn't find any evidence."
sigh deeply: "He sighed deeply when he heard the news."
sit comfortably: "She was sitting comfortably on a sofa when he walked in."
speak softly: "It was difficult to hear her as she was speaking softly."
think carefully: "Please think about this carefully – it's a big decision."
vary widely: "Marriage customs vary widely from culture to culture."
work hard: "We work hard in the office."