English Grammar/Basic Parts of Speech/Interjections

An interjection is a word or group of words that is used to express surprise, fear, pain or other emotions. It is not grammatically related to other words in a sentence, so it functions independently. It may be followed by an exclamation point, or a comma when part of a complete sentence.

Examples

 * Ouch! You hurt my knee.
 * Hello, how have you been?