Morphology is the study of the internal structure of words and the rules governing the formation of words in a language and how the words are joined in the coherent messages.  Awareness of English morphology enables language teachers to help their learners understand how words enter a language, what they consist of, and how they are formed by combining prefixes, suffixes, and roots. 

Students of English need to establish a sound knowledge base in understanding the structure of words and word-formation processes. Developing an awareness of English morphology will enable language teachers to help their learners understand how words enter a language, what they consist of, and how they are formed by combining prefixes, suffixes, and roots. Recent research suggests that learners with an awareness of word-formation processes tend to have a larger vocabulary and better reading comprehension (Kieffer and Lesaux, 2008; Kieffer and Lesaux, 2012a/2012b), and by extension better writing (Templeton, 2012). Consequently, morphology can be a valuable instructional tool for language learners to develop and use vocabulary creatively.