An exclamatory sentence is a type of sentence that expresses strong emotion or excitement. It often ends with an exclamation mark (!). For example, "What a beautiful day!" conveys joy and enthusiasm. Exclamatory sentences can be used to show surprise, anger, happiness, or any other strong feeling. These sentences can start with words like "what" or "how," which help emphasize the emotion. For instance, "How amazing this concert is!" highlights excitement about the concert. Exclamatory sentences are a powerful way to convey feelings in writing and speech.