Here are some key points about prefixes:
* They don't change the word's part of speech. For example, "un-" can be added to both verbs and adjectives.
* They can modify the original word's meaning in various ways. Some common ways include:
* Negation: "un-", "in-", "non-" (e.g., unhappy, invisible, non-fiction)
* Size or quantity: "micro-", "mega-" (e.g., microscope, megaphone)
* Time: "pre-", "post-" (e.g., pre-game, post-mortem)
* Location: "sub-", "super-" (e.g., submarine, supermarket)
* Direction: "trans-", "retro-" (e.g., transatlantic, retro-active)
Examples of prefixes:
* un- (unhappy, undo)
* re- (re-read, rebuild)
* pre- (pre-game, pre-existing)
* mis- (misunderstand, misplace)
* anti- (antibiotic, anti-gravity)
Knowing prefixes can help you:
* Understand new words.
* Expand your vocabulary.
* Improve your reading comprehension.
* Write more effectively.