Interjections are words used to express strong emotion or excitement! An interjection can be one word or a combination of words. Often we use an interjection in place of a sentence. It is not uncommon for one word to share a generous thought or two. It is important that the speaker and those listening understand the English language at an advanced level. Interjections can be regarded as metaphors. You must interpret the true meaning of an interjection. Often, an interjection is used at the beginning of a sentence followed by a statement of some kind. Interjections are a fun part of English.